Formulated for the severe operating conditions of today's pick-up trucks, SUVs, heavy equipment and other hard-working vehicles.
AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricants are premium grade gear oils specifically engineered for maximum performance in severe duty applications. These state-of-the-art AMSOIL formulations feature an exclusive blend of high viscosity, shear stable synthetic base oils and an extra treatment of high-performance additives.
Package sizes include:
1-Quart Easy Pack & case of 12
1-Quart Bottle & case of 12
5-Gallon Pail
16-Gallon Keg
30-Gallon Drum
55-Gallon Drum
AMSOIL SEVERE GEAR Synthetic EP Gear Lube is excellent for severe applications, such as towing, hauling, steep-hill driving, commercial use, plowing, racing, off-road use, rapid acceleration, frequent stop-and-go operation and high ambient temperatures. Higher horsepower, towing and hauling capabilities of modern vehicles make turbo-diesel pick-ups, SUVs, vans and delivery/utility vehicles especially prone to severe service. Other severe-duty vehicles include light, medium and heavy-duty trucks, buses, heavy equipment, 4X4s, tow trucks, race cars, tractors and motor homes.
AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Gear Lube is a premium-grade gear oil specifically engineered for maximum performance in severe-duty applications. This state-of-the-art AMSOIL formulation features an exclusive blend of high-viscosity, shear-stable synthetic base oils and an extra treatment of high-performance additives. AMSOIL SEVERE GEAR Synthetic EP Gear Lube maintains its viscosity for long-lasting protection against metal-to-metal contact. The proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring. AMSOIL SEVERE GEAR helps prevent "thermal runaway" - a phenomenon caused by a lubricant's inability to control friction and increased heat under high-stress conditions. By controlling thermal runaway, AMSOIL SEVERE GEAR Synthetic EP Gear Lube inhibits rapid lubricant degradation and component damage. Equipment runs better and lasts longer with AMSOIL SEVERE GEAR Synthetic EP Gear Lube.
AMSOIL SEVERE GEAR provides performance beyond that possible with conventional gear oil. This AMSOIL custom product offers superior gear and bearing protection, better friction and heat reduction, increased efficiency and extended service life.
AMSOIL SEVERE GEAR EP Gear Lube excels in hot and cold temperature extremes. By design, it resists breakdown from high heat, preventing acids and carbon/varnish formation. Its wax-free construction also improves cold-flow properties, improving fuel economy and cold-weather shifting.
Some gear lubes fail to meet basic low-temperature requirements. Mobil 1 75W-140 Gear Oil, for example, failed to meet the requirements of the industry standards, AMSOIL SEVERE GEAR®, on the other hand, delivers 20% more cold-temperature protection than the standard requires. It delivers better cold-temperature protection than Mobil 1 and Valvoline SynPower.
• Advanced protection against wear, even with up to 15 percent water contamination 1
• Controls Thermal Runaway
• Protects against rust and corrosion
• Helps reduce operating temperatures
• Maximum efficiency
• Flexible easy-pack for clean, fast installation
• For product service life in differentials, consult your owner's manual or the Original Equipment Manufacturer (OEM) to establish the application, NORMAL or SEVERE.
1 Based upon AMSOIL testing of AMSOIL Synthetic SEVERE GEAR® 75W-90 and Long-Life 75W-90 Synthetic Gear Lube in ASTM 3233 and ASTM D892.
2 Based upon results of samples of Mobil 1 75W-140 and Valvoline SynPower 75W-140 purchased in 2018 and tested in ASTM D2983 by an independent testing facility in May 2018. Samples sent blind to eliminate bias.
* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.
| . | Normal Service | Severe Service |
| Cars, SUVs, Light Trucks | Drain at 100,000 miles of service or according to the owner's manual, whichever is longer | Drain at 50,000 miles of service or according to the owner's manual, whichever is longer |
| Heavy-Duty Class 8 Line Haul | Follow the OEM drain interval (miles or hours) for synthetic oil up to 250,000 miles or three years, whichever comes first. | |
| Vocational/Delivery | Follow the OEM drain interval (miles or hours) for synthetic oil up to 120,000 miles or three years, whichever comes first. | |
| Heavy Duty Off-Road | Follow the OEM drain interval (miles or hours) for synthetic oil up to 100,000 miles or two years, whichever comes first. | |
For product service life in non-differential applications,consult owner’s manual or the OEM for either normal orsevere synthetic oil service intervals. Where service intervalsare unavailable, drain at twice the interval for conventionaloil.
Gear oils should be changed more frequently when operatingvehicles or equipment in dusty or dirty conditionsunless the gear system is properly sealed and equippedwith membrane type breathers.
Note: AMSOIL does not support extended drain intervalswhere water contamination occurs. Check and service thegear oil frequently when water contamination is possible.
Recommended for use in differentials, manual transmissions and other gear applications requiring any of the following specifications: API GL-5, MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037), Mack GO-J, or other GL-5 based specifications from vehicle manufacturers, including Ford*, GM* and Chrysler*. Can also be used in axles where an API GL-4 lubricant is recommended.
AMSOIL SEVERE GEAR® (75W-90) provides superiorperformance and replaces competitors’ 75W-90 and 80W-90 gear oils. It delivers the best fuel efficiency and cold temperatureperformance of the SEVERE GEAR oils.
AMSOIL SEVERE GEAR® is compatible with conventionaland synthetic gear oils. Mixing AMSOIL gear oils with otheroils, however, will shorten the oil life expectancy and reducethe performance benefits. AMSOIL does not supportextended drain intervals where oils have been mixed.Aftermarket oil additives, other than those specified byAMSOIL, are not recommended for use with AMSOIL gearoils.
AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).
Click here to view the MSDS Data Sheet for AMSOIL SVG.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL TECHNICAL PROPERTIES | |
| AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricant 75W-90 (SVG) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D-445) | 15.9 |
| Kinematic Viscosity @ 40°C, cst (ASTM D-445) | 102.4 |
| Viscosity Index (ASTM D-2270) | 166 |
| Brookfield Viscosity, cP (150,000 Max) @-40°C | 78,400 |
| Flash Point, °C (°F) (ASTM D-92) 150°C Min. | 208 (406) |
| Pour Point, °C (°F) (ASTM D-97) | -43 (-45) |
| Copper Corrosion (ASTM D-130) 1b Max @ 121 °C (250°F) / 3hr | 1b |
| Foam Stability (ASTM D-892) | 0/0, 10/0, 0/0 |
Now available in a durable, all-in-one easy pack
Differential & Transfercase can get destroyed if neglected. This tip can help avoid expensive repairs.
Product Name: 75W-90 Severe Gear® Synthetic Extreme Pressure Lubricant (SVG)
Current Rating: 4.92out of 5 stars
Votes & Reviews: 158 vote(s) and 153 user reviews.
Reviewed by Colin: 
Another great Amsoil product. I used it in my BMW K1600 GTL drive shaft. These drives can be a bit sloppy but it seems quieter and more precise since I put in the Amsoil.
Reviewed by Barry:
Replaced RCF TVD rear diff fluid with severe gear 75w-90 and I felt an instant smoothness when I reversed. It didn't feel stiff or feel as if there was any resistance. Gone 1000 miles so far and it still feels lubricated.
Reviewed by Nicolas:
I run Amsoil 75-90 Sever Gear in all of my axles. Really good gear oil!
Reviewed by Roger:
I have heard every bit of good about AMSOIL products for and finally started making the transition over
Reviewed by John:
Best differential oil i have ever used!!
Reviewed by Al:
Started using this in my '06' soft tail and ultra classic makes finding neutral easier and shifting is smooth as silk!
Reviewed by Thomas:
Use this in my Harley Trans Works Great
Reviewed by Steven:
The best oil for the transmission, no gear noise,
Reviewed by Boston:
The only oil to use in a S2000 rear diff! Awesome stuff that holds up to track abuse.
Reviewed by Richard:
I can tell the difference after changing to Amsoil gear lube in my 2008 FJ Cruiser smooth and quite.
Reviewed by Kenny:
Fantastic product love it
Reviewed by Vance:
Great oil no noise in the rear end. Doing the job for sure!
Reviewed by Bill:
love your product the only thing i use in my cars and trucks
Reviewed by Steve:
I've been using this in my Harley Davidson Ultra Limited's gearbox since it was new in 2013. Started using it in 2006 on previous Harley. I could tell a difference immediately. Smoother shifting and confidence the gearbox was better protected than the OEM requirement of using engine oil in the gearbox.
Reviewed by JC:
We use it in our gear boxes for our machinery, and recreational products.
Reviewed by Bill:
From all the online reviews, this was the best choice for heavy duty application. I'm using it for off road high load applialcations and also over the road heavy truck and motor home use.
Reviewed by Superglide99:
Made a noticable difference in shifting smoothness and noise on my 6 speed Harley transmission.
Reviewed by Branden:
I have run this in my 2006 ram 1500 hemi 9:25 diff for 5 months in combination with the Amsoil anti slip with zero complaints.
Works great in cold weather(-30F), will be using this on all differentials in the future.
Reviewed by Joe:
I own several motorcycles and use this product in the final drive and transmission. have a combined 75,000 miles with no issues
Reviewed by Ben:
Off roading demand that U change oil often
Reviewed by None:
Use in my tranny and Qick change round track asphalt car.
Reviewed by Rcw:
Since 2005 I've been a dedicated user of Amsoil products in all of our autos and high performance BMW motorcycles (S1000RR and K1600GT).
Never have I had any issues using these products.
Reviewed by Comer:
Put it in the rear end of my 68 gto. Great great product.!
Reviewed by Mario:
Bought this product to change the gear oil in the diff for my Dad's 2000 Chevy Silverado. So far am very pleased with it! Got some to put in the diff of my Spec Miata race car as well.
Reviewed by Nate the hotshot:
175,000 trouble free heavy haul miles. The new gear oil pouch makes it so easy so change diff fluid. Make the switch to Amsoil today. Proven protection in the worst conditions.
Reviewed by Hunter:
I use amsoil for all my lubricant needs. Before switching, i would have never believed that you could feel a difference while driving with amsoil but.... i was amazed.
My Nissan 370z nismo just felt smoother in every way.
Thanks amsoil!
Reviewed by SE:
Ive been running this in both axles for 112,000 miles. I dont have issues with kicking it in 4WD in extreme cold (no 4WD button/knob in this rig). The rear locking Eaton differential works reliably with zero noise. I tow consistently and I tap shift 97% of the time I drive to avoid using my service brakes which puts extreme stress on my drivetrain (bought truck new, truck has 125K hard miles, original factory installed rotors & pads are still on it and only the pads have worn by 2mm max). I drain & fill the diffs every 45K and I only get metal dust at the plugs, no flakes. So, I would say its working well.
Reviewed by Moo:
Great
Reviewed by Eric:
i use it for racing
Reviewed by Dallas D.:
I switched from OEM Honda differential oil to Amsoil when rapsy metallic noises started coming from the differential after sweeping curves (street, not track etc.). The raspy noises disappeared immediately, and as of the 1-year mark, they have not returned.
Reviewed by J. Rasmussen:
I've used these products for well over 25 years and recommend them to my friends. Nothing but Amsoil, from bumper to bumper in my vehicles.
Reviewed by Angel:
Love it. Ashley Carte was great help.
Reviewed by brb:
I use it in all my dmax trucks
Reviewed by Sam:
I have been using Amsoil oils for little over 15 years now and swear by it. Great product with excellent quality. Keep it up please.
Reviewed by Ali3nFx:
Picked this up over all oem fluids. I now run all fluids from the engine, trans, tcase, rear diff and Ayc in amsoil
I also bought fortune auto 510's because they use amsoil in the dampers.
Reviewed by Brian:
I put this in my 2001 legacy gt and shifting felt awesome. Well I got a 2013 WRX and of course changing all fluids to Ams-oil and shifting since switching to it has been buttery smooth. I couldn't be happier.
Reviewed by Concrete pumper:
Use it in my 6.0, 6.7, and 7.3. Works like a charm!
Reviewed by Kieran:
I do not use any other gear lubricant in my vehicle. I trust Amsoil Severe Gear to keep my vehicles running top notch, no matter what I put them through.
Reviewed by Cenok:
Good price for a quality product. Doing the job well!
Reviewed by Neil:
I have used this in my side by side, truck and absolutely notice an improvement in the smoothness and lower noise levels with this gear lube. Highly recommended.
Reviewed by Dave300:
I use Severe Gear lubricant in my 2016 Harley Street Glide's gearbox. It immediately shifted smoother and it's easier to find neutral. Plus it quiets the first gear clunk to some extent.
Reviewed by Dale Junior:
Amsoil is really good using it for years
Reviewed by TimU:
I purchased a 2007 HD Ultra Classic in Nov. 2006. It was the first year of the 96 cu. in. Engine and 6 speed transmission.
In the first 600 miles I was bothered by hard shifting, and a noisy 6th gear. I found out Harley had used their 20W-50 oil in the trans.
At 600 miles I replaced the transmission oil with Amsoil Sever Gear 75W-90. Problem solved.
My bike now has 60K miles and the trans shifts beautifully with no noise.
Reviewed by Big68:
Use in the rear end of my 40' diesel pusher. The test prove it is the BEST.
Reviewed by Jamie:
Ive been using amsoil for years in my bikes. As soon as I buy a new bike amsoil goes in it. Holds up to heat and the beating I put it through. Also quiets the trans and can find neutral a lot more easier. The only downside is its clear. Makes it difficult to see on dipstick.
Reviewed by Rob:
I have a dodge ram 6.7 cummins 2500 4X4 Truck that pulls a 14k Fifth wheel. I noticed my rear end was chattering when turning on long trips. Acted just like it needed slip additive. All the info I could find said no additive. Dodge dealer wanted to do diff work...NOT 80k miles and no noise..
I decided to go up on wt. to 110 sever gear. All GOOD! Perfect! I tell everyone I meet to trash the mopar fluid if your working your truck.
Reviewed by Joe:
I have found that all of the Severe Gear Full Synthetic Gear Lube to be the highest quality! I wouldn't use anything else.
Reviewed by big john:
my truck pulls a trailer that is right at its maximum gvwr. when it comes to the differential, i wanted the absolute best gear oil on the market. amsoil conducted a test on many gear oils available. severe gear scores higher over all [meaning average] when considering the all of 14 ways the oil was tested. for many years amsoil has conducted comparison tests of their best synthetic oils. amsoil always scores a higher average in the tests. i have heard people try and say their favorite oil is better than amsoil, but they cannot point to any testing that would support their opinions.
Reviewed by PW John:
I have been using Amsoil exclusively in my 07 power wagon for over 2 years. With electric lockers front and rear, this is the only oil that keeps the lockers functioning perfectly. A lot of power wagon owners have issues with slow locker engagement, but mine engage almost instantly, and I no longer have foamy gear oil when I open the diffs.
Reviewed by Boss Truck:
I use this product and I highly recommend it.
Reviewed by Ryan:
Replaced the gear oil in my 07 f150 with amsoil and couldn't be happier. Pretty sure I even get a mpg or 2 better gas millage as well. Transmission also tends to downshift less going up hills. Next up I will be switching out the trans oil with amsoil as well.
Reviewed by Dell:
Great gear oil. Running it in both of my diffs with no issues for ~5k miles on the new truck (I know, nothing compared to a lot of others) and 30k mi on my previous Jeep. The gear oil smells rich (very scientific, I know !) and pumps great. Several years ago I was approached by an AMSOIL fanatic who I got a very MLM scheme feel from, but after digging in; I'm sold. Doesn't matter if it's a new or used vehicle, I make a habit of changing every fluid to AMSOIL. Regardless of if you believe the 3rd party tests, I like the peace of mind in knowing I'm running the best in my vehicles.
Reviewed by SHAWN:
This is the first product I started using in the Amsoil line. It is what sold me on the product. I was told the seal conditioners in the oil would help pinion seals quit leaking. They did! I have have absolutely seen increased performance from differentials using this product.
Reviewed by John:
I recently replaced my engine and gear oil in my 2010 Dodge 2500 diesel and am hoping for the best. I tow a toyhauler and it is extreme in AZ in the summer so i am hoping these products are as good as advertised. I do not want to risk any break downs so anything i can do to prevent one is in my best interest. So far so good.
Reviewed by The fixer:
I have used many different synthetics over the years. I Choose AMSOIL based of independent testing and from personal experience of seeing how well it works.
Reviewed by Bruce:
In my car I use amsoil exclusively. Couldn't be happier!
Reviewed by Ode:
I have this in 2 different vehicles. Its grate stuff.
Reviewed by jb882:
I ran this oil in my old 2006 sillverado's differentials for over 200k miles and ever had to repairthem for any reason.
I recently put this in both the front and rear end of my 2014 Silverado. The factory oil in the rear end was much thinner and my rear differential was noisy. This oil cured that instantly and now its nice and quiet. Despite this oil being thicker than factory i have not seen any negative difference in fuel economy.
Reviewed by Earl:
Stopped all noises when shifting from forward to reverse
Also added sliplock
Reviewed by Scrubb:
Excellent
Reviewed by Mike:
Great product, no friction modifier needed, differentials really quiet, piece of mind when towing!
Reviewed by Sparky:
I've changed both front and rear differential with this product very good
Reviewed by Rob:
I've been a long time user of Mobil 1 recently switched to amsoil after much research a far superior lubricant.
Reviewed by Mike:
I have been using this product for years in my 1996 Heritage Softail Classic. I have reviewed the technical comparison reviews and selected Amsoil over your competitors.
Reviewed by Red:
I abuse this truck. High torque, towing (7k), and spirited driving are the norm. The gearbox doesn't chatter, used L/S additive, and is very quiet.
Reviewed by T man:
Drained front differential oil after 100,000 miles still as clean as the day I put it in!
Reviewed by c9zx:
I've used this, and other Amsoil products, for many years with very good results and no problems.
Reviewed by Travis:
Used for a a 2015 Ram 1500. The old oil came out at 77 k miles. It was foaming extremely bad (air bubbles in oil). I replaced with severe gear and Amsoil's limited slip fluid.
I noticed smoother driving characteristics with the severe gear. The truck rolls better. I also noticed a 1 mpg increase in fuel economy.
Reviewed by mykhailo:
I have 2013 freightliner Cascadia. Was changing oil in differentials. So far, best product market has to offer. Differentials runs much quieter, lower temperatures. And over all feels so smooth.
Reviewed by watercooled:
I had this gear oil installed in my 1994 Ford Ranger XLT 2WD differential by a local repair shop. An inspection of the gear set revealed all was well. This truck has well over 200,000 miles on it and this marked my second differential oil change. My decision to use the Amsoil 75W-90 Servere Gear oil was based on the fact this truck hauls a wide variety of cargo (from rocks, wood to motorcycles) and I treasure reliability. After driving this truck for 23+ years, I've become familiar with it's sounds and feel and I noticed an absence of a slight howl coming the back of the truck at freeway speeds. No other changes or adjustments were made during the oil change and I maintain my own tire pressures. I look forward to not having to be concerned about this for another 100,000 miles!
Reviewed by Richard:
use in my rubicon jeep
Reviewed by Richard:
so far good
Reviewed by Pdtv:
Used this in my 18 Ram 2500. Reading some forums, some people had to use limited slip additive in their rear diff because of some chatter even though they have a torsen style limited slip with no clutches. I have not had any of this chatter with this oil.
Reviewed by JMIII:
Great synthetic gear oil.
Reviewed by Craigalachie:
Did my research this is the gear oil to put in my differentials on my one ton Dodge
Reviewed by Adam:
After 100,000 miles on my 2008 Tacoma I switched to Amsoil and saw noticeable smooth shifts out of my manual transmissions especially in colder weather.
Reviewed by John:
So far, so good. Running it in a FJ cruiser.
Reviewed by 129CBRider:
Made my unshiftable 2001 Audi TT 6-speed shift like new again in less than 200 miles!
Reviewed by Chavita:
Used on my Silverado .Runs great !
Reviewed by John:
Haven't used any other fluid. Change my differentials fluids every 2 years, will not use any other.
Reviewed by Josh:
I use the full line of amsoil products in my home garage/shop and have been very satisfied with all of them in all of my personal cars, powersports, and customer vehicles.
Reviewed by Kyle:
Hard to know exactly how this will perform long-term, but since I have 100Ks of miles using all manner of AMSOIL products in cars, motorcycles, ATVs, tractors, and small equipment, I also have no doubt this is a top notch oil and I'll likely never have to replace this oil in my Outback again. The peace of mind I get with AMSOIL products and the ability to have extended drain intervals is second to none.
Reviewed by Fjcruisin:
Officially my go to diff lube, way better than factory fluid.. changed out diff fluid at 40k and again now, this fluid looked good still, I believe it could've lasted a good while longer.. used on Fj cruiser off reading and towing.. thanks amsoil for such great products
Reviewed by H1:
I've used Am's oil for almost 25 years now in racing , hauling , commuter car and even my hoists use it . In all the years I've used Am's oil I've never had a component fail that was useing it . For the most part the higher initial cost is offset by the longer service intervals . At 30 below I've seen the Am's oil 5w30 and conventional 5w30 . The Am's oil pours nice and the conventional was like year.
Reviewed by David:
Quick easy ordering and delivery, excellent product
Reviewed by Cire:
The ONLY oil that works for your Camaro V6 Gear Box(2010-up)...Doesn't have the friction modifier ,thus making it perfect for my application. Tried everything , and this works better than the OEM
Transmission is Aysin 6 speed
Reviewed by Kody:
I have ran this gear oil in every vehicle I have owned. I trust it more than whatever they put in at the factory. It is good for everything I do from going fast down the interstate to pulling heavy loads. I also use it in my chain case in my skid loader. It's a great all around gear oil.
Reviewed by Eyhab:
Getting a mile per gallon since I used it
Reviewed by SeeDub:
Meets or beats all OEM gear lube.
Reviewed by Jeff:
Use this in my 2008 Mitsubishi lancer evo x gsr. Transmission, transfer and rear diff all operate alot smoother than ever before. I am really happy with the product. Not to mention there real easy to pour or siphon.
Reviewed by Scapegoat:
I have several motorcycles with driveshafts and I use this product for the final drive oil. I prefer to use Amsoil products in my vehicles because of their reputation for developing quality products.
Reviewed by Fredinator:
A am pretty sure this is good gear oil, lots of good reviews. I can not test the stuff self, I am just an end user. Will probably buy again.
Reviewed by SilverBack:
I run this in a Caterpillar D7 great product
Reviewed by Tommy:
I commute 1500 miles a week. Amsoil is clearer at changes than all other products i have used. There is no doubt that it is the best on the market, And I spend less $$$. Will be customer for life.
Reviewed by Chris:
Use in all my vehicles, noticeable difference especially rearend a which have lockers.
Reviewed by bigtree:
One of the best oils around
Reviewed by Tundoo tower:
I bought a case of this to replace what is in the rear end of my tundra and it is a great product. The truck tows frequently (3x a month for 100 miles at a time) and I wanted to have a quality oil in there.
Reviewed by Brandon copp:
I w been using the 75w-90 severe gear in my dirt track race car. I've never seen any abnormal wear or damage to a set of gears in the two years I've used it
Reviewed by GreenMachine:
Used this in transfer case and diffs of a 2013 FJ Cruiser for 30k miles. Vehicle is daily driver and upgraded and abused off road. Stock fluid after 30k was dark and separated in appearance. After 30k with AMSOil Severe Gear, the front diff AMSOil fluid looked almost new with significantly reduced metal shavings. The rear looked only lightly used with once again significantly fewer metal shavings. I highly recommend this fluid!
Reviewed by John R.:
I have used this product on applications calling for 75W-90 on Ram/Chevy/GMC trucks & SUV'S. To date I have been using this product for about 17 years and with no issues. Thank you.
Reviewed by Dman:
The best oil made
Reviewed by White line fever:
It does what I expect from the best
Nuff said.
Reviewed by Duramax pro:
I love this gear oil best gear oil I've ever used
Reviewed by Younggun466:
I run this in my 95 k1500 front and back diffs and my 05 2500hd duramax front and back diffs. Great stuff works very well I've never had an issue.im happy to know I have the best protection from the elements so it's peace of mind running this stuff.
Reviewed by Turboguy:
This is a great gear oil . Can't go wrong with this product.
Reviewed by DIYer:
Replaced OEM front and rear differential fluids of a new 2017 AWD Subaru Outback, and refilled with this 75W-90 product at approximately 3000 miles. With OEM fluids, an infrequent driveline 'clunk' used to occur when making tight (e.g., U-) turns. This behavior has NOT occurred (in over 2500 miles) since after refilling with Amsoil's synthetic Severe Gear differential oil.
For our vehicle, changing out the differential fluid shortly after 'breaking-in' the differentials seemed to be a good choice (judging by the drain plug magnet debris). I obviously can't comment about product longevity, but with the elimination of an infrequent driveline 'clunk', we're extremely pleased thus far!
Reviewed by Adam:
Used for rear gear oil changed in 2005 Chevy Duramax. Works as described have used before and was pleased with Performace when towing boat, looking forward to the future performance of severe gear oil.
Reviewed by Frank the tank:
Replaced the factory fill with two quarts of severe gear.
Reviewed by Emitt:
As with all other AMSOIL products that I use in everything I love it and recommend all their products to everyone who cares about their investments.
Reviewed by eric:
Working good. Truck pulls 15000lb camper 90% of the miles.
Reviewed by Vet head:
Performs great.
Reviewed by Barf:
this stuff rules my roost
Reviewed by Sam:
I haven't been using amsoil for long, but I have been happy with everything I've purchased so far. Will continue to use amsoil fluids throughout our vehicles.
Reviewed by Tom m:
I had a hundred twenty five thousand miles on a truck I bought changing rear end oil was only natural Amsoil was my first choice and only
Reviewed by Dante:
I use this in my from and rear axles on my Toyota 4x4 and my Arm's. Have used this stuff for many years and love it
Reviewed by Big D:
Works great. Pick up shifts quietly and the interval for changing the transfer case makes it a great value. Just don't get it spilled on anything clothing you like.
Reviewed by Big D:
Works great. Pick up shifts quietly and the interval for changing the transfer case makes it a great value. Just don't get it spilled on anything clothing you like.
Reviewed by Clint the shade tree:
I use this product in all my vehicles. Wouldnt trust anything else. You get what you pay for and pay for what you get. Great stuff!
Reviewed by Sfa:
Excellent product for differential protection
Reviewed by Brian:
Great product ,great price
Reviewed by deuce:
I use 100% amsoil products. I have a modified camaro ZL-1 with 940 HP at the crank. The gear lube and engine perform flawlessly. I maintaing at least 3 to 4 lbs more oil pressure throughout the life of the oil. I will never switch brands.
Reviewed by Opie:
I've just did the second diff service on my Toyota Tundra. The oil that came out still looked brand new after 30000 miles. I'll go longer on the next service for sure.
Reviewed by Ironman:
This stuff is great.
Reviewed by Jamie1177:
Amsoil does not control friction modifier, so if you have a limited slip diff don't use the gear oil alone!!!!!!
Reviewed by Bobtam:
Been using this in my Z06 Corvette for a few years with some track time and very happy with the product. No need for a limited slip additive. Changing it this spring.
Reviewed by Timchenko Dimitri:
Great oil!
Reviewed by Calif. Buckeye:
I use AMSOIL for everything because AMSOIL is what is called a Reference oil. An oil that all other oil Mfr's aspire to be like. A bench-mark oil. Would not, could not use anything else!!!
Reviewed by Andrew:
Every time someone asks what i put in my Differential's & Transfer Case, I tell'em AMSOIL.
Reviewed by Scott:
My front and rear diffs love this stuff !! Temps dropped considerably after swapping to this !!
Reviewed by Zach:
Use this amazing gl5 gear oil from the diffs in my duramax to the diffs in my 600whp Mitsubishi Evo. They are always ready for the challenge!
Reviewed by Rabbit:
Pull a 21000 lb fifth wheel about 20 percent of the time. Installed this in my differentials (4x4) at 30,000 miles and changed it again at 150,000 miles. Old fluid looked and smelled just like the new Amsoil I replaced it with. No metal on magnets no seal leaks. My truck's fluids are all Amsoil. Great products and so is the service.
Reviewed by Lou:
Always performs well and has protected my gears for literally hundreds of thousands of miles with never a failure.
Reviewed by DANIEL:
Best gear oil for my outboard
Reviewed by Steven:
It works as advertised Great product.
Reviewed by Mac:
I own a 2002 4 wheel Drive Chevy Tahoe. I'm a Tournament Fisherman, and I use my Tahoe to tow Thousands of Miles every year. I have Always used AMSOIL Series 3,000 5W/30 in the engine, and also use AMSIOL Severe Gear 75/90 in Both Front and Rear Differentials Without ever having any driveline Problems with my 14 year old Chevy.
Reviewed by David:
Put this in my 1995 Corvette differential with limited-slip clutch packs. 10,000 miles so far and no issues. I purchased the AMSOIL synthetic product for its superior quality and long service life... will last longer and protect my vehicle better than conventional, so in the long run it's definitely worth the added cost.
Reviewed by Claudius:
I installed the Severe Gear Oil in my 2013 Toyota Tacoma TRD Sport 4x4 and it works great. I put in my transfer case as well.
Reviewed by Timothy:
Used this in my air cooled 911 trans. Much more smooth shifting.
Reviewed by Leon:
Bought this for a complete rebuild on my 2005 Dodge Ram 3500. I have about 1000 miles on it and it is still clear in the sight glass. Sounds a tad better too.
Reviewed by Larry:
I just used this product in the transfer case and front and rear differentials of an AWD Infinity.
Reviewed by Flash.:
Used in a off road truck. no failures, change every 30,000 miles and is still clear as a bell.
Reviewed by Toneup:
Used gear lube in transfer case in 2013 Acura RDX AWD. Working great.
Reviewed by WayneO:
I have used Amsoil products in my entire driveline of all of my vehicles and equipment for years. I run Severe Gear in the transfer case and both differentials of my truck, and the rear differential of my high horsepower car. The benefits are: smoother and quieter operation, especially in cold weather; 1-2 mpg increase; much better protection. I do not use extended drain intervals, but there is always that option. I'm picky about my vehicles, I use this for the protection, better operation, and peace of mind.
Reviewed by Bam!!! There's the boss:):
My new F-150 only has 15k on it now and I still haven't changed the front axle but I did switch the rear over to 75-140 at 10k. Had a ford ranger that I bought new and switch it's rear to amsoil at about the same mileage. I used it for my lawn service runner. It was over loaded it's whole life up until 102,000 when I was hit and they totaled it. I sold that rearend to another guy that was going to rebuild it with a spool and deeper gears. He called me back and said it looked like brand new inside. Pretty amazing considering what that truck went through.
Reviewed by PaulT:
I have been using this product in all my vehicles, and have nothing but rave reviews. The product keeps the gears quiet, and it still looks clean at every chnage interval.
Reviewed by Luke Bausum:
I had got it to replace the old diff oil in both differentials in my 2002 Chevy Blazer LS, it works great, it accelerates smoother/ faster than the old oil, and it the vehicle had over 200,000 miles on it when I changed it, now it has over 201000 miles on it and it's still doing great!
Reviewed by SpaD:
Had the oil in the diff previously and came out slightly worn looking. 70k miles. Never had any issues so far with the Limited Slip Diff locking up. Using AMSOil transfer tubes worked well also. Just had the car on ramps.
Reviewed by Dodge Ram 2500HD Diesel:
I haven't had any issue and all gears have been working good.
Reviewed by David:
I typically do most of my own maintenance, but due to time constraints, I had my mechanic change the oil in the rear differential on my 2008 GMC 2500 HD truck. The truck is used as a daily driver plus towing my 10,000 lb. travel trailer. This is the second oil change. When I picked up the truck, the mechanic said "Wow, that Amsoil is amazing - the old oil looked great - hard to believe after 100,000 miles." He volunteered the response, I did not ask.
Reviewed by Isaacsracing:
I used Severe Gear in my FJ, 3/4 ton Suburban and two Porsche track cars. It is the best gear oil out there. I use Amsoil Slip Lock with Severe Gear for perfect, noise free operation of a limited Slip in the track car. Works great.
Reviewed by GER:
I run this is my mini quads transmissions. It holds up better than anything else we have found. Always looks good and we seem to get longer life than the rest of the racers.
Reviewed by Chip:
I use this weight in my 91 Cummins W250, year round from -40 to +110.
Front Dana 60, rear Dana 70 & the NP205 transfer case.
No molasses effect in extreme cold & gear wear patterns should be optimal as always.
Thank you Anne & Alex.
Re: One of AMSOIL's best products
Thank you Chip. Just want to point out to other enthusiasts that the AMSOIL Online Product Application Guide will show them the correct viscosity for their application and whether or not Slip Lock additive is required. The guide also provides quantities required. Quite a handy tool.
Replied by Tech Admin
Great gear oil
Great product, keeps my diffs in great condition.