Product Reviewed: 75W-110 Severe Gear® Synthetic Extreme Pressure Lubricant (SVT)
Current Rating: 4.91 out of 5 stars
Votes & Reviews: 32 vote(s) and 92 user reviews.
Reviewed by Chad: 
Great product, keeps my diffs in great condition.
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 Terry:
I've been using Amsoil for over 30 years from everything 2 stroke, and every kind of racing engine you could think of. Also transmissions rear drive axels and also my everyday daily drivers. The proof is no failure and awesome reports from pro builders that rebuild my stuff.
Reviewed by Fixmy59bug:
I have replaced all my OEM fluids with amsoil and my Jeep is much nicer to drive. Shifting (manual transmission and transfer case) is smoother, differential whine is gone.
Reviewed by Tfmopar1:
Gears are quieter and runs cooler I run this in my daily drivers and my old cars example 670 hp Cuda that I road race, I do have to add the limited slip additive for it not to chatter
Reviewed by Loren from pa:
I have used amsoil for many years and alway been happy with results, my truck has 358.000 on it with no major breakdowns and still going strong,
Reviewed by MrHighCALiber:
Installed in my awd ptu on a 2012 Taurus sho. 75w140 is recommended but the severe gear 75w140 holds up well for my 30k mile change interval and I don't worry about it thickening. This ptu is in a very high heat zone near the catalytic converters and it beats up the lube, turning it to paste in about 50kmiles. Now with catless down pipes (40°f+ lower ptu temps) I don't need 75w140. The 75w110 severe gear is working great, and I notice less drive train drag than with the 75w140.
Reviewed by dauby:
upgraded to a better product
Reviewed by Alex:
I replaced the 85w140 conventional in the 14-bolt full float rear axle in my '85 GMC with Severe Gear 75w110 and noticed the difference immediately! Gained at least 15 horsepower. Good stuff!
Reviewed by DE:
No more whinning, runs cooler, smoother shifting, and nutural is found 1st time every time
Reviewed by Southern Viking:
Simply the best hands down. My trucks tow heavy in the most extreme heat conditions, this can be torture on gears. I typically run my trucks to about 500k then replace them. To date I have never had a single issue in the rear end at all, other than the occasional pinion seal. Do yourself a favor and step up to real protection.
Reviewed by MadMatt!:
got another 70000 miles out of it .I was sold been using it in every vehicle sence. When you do all your own service work yourself you notice where n tear on internal parts, and i've got to say the products from amsoil When you rely on your truck to make a living and cant afford break downs. You only put the best product in it. I've used other products in the past. but one slipping transmission and switched to amsoil products. Well offer the best protection i've come across "greasy" Hands Down Matt.S.
Reviewed by MadMatt:
got another 70000 miles out of it .I was sold been using it in every vehicle sence. When you do all your own service work yourself you notice where n tear on internal parts, and i've got to say the products from amsoil When you rely on your truck to make a living and cant afford break downs. You only put the best product in it. I've used other products in the past. but one slipping transmission and switched to amsoil products. Well offer the best protection i've come across "greasy" Hands Down Matt.S.
Reviewed by Jason:
I know Amsoil is the best. Anything with Amsoil in it will live its intended lifespan.
Reviewed by Stephan:
Happy to have this oil in my heavy duty work truck, used to haul thousands of pounds on a regular basis. No sign of fatigue yet!
Reviewed by Mark:
I use AMSOIL Severe Gear 75W-110 in the 6-speed transmission of my 2009 H-D Road King. The SYN-3 oil installed at the factory made the transmission noisy and hard to find neutral when it was warmed up. Since I starting using AMSOIL Severe Gear 75W-110 over 24,500+ miles ago, my transmission has stayed much quieter, shifts without "clunking" and finding neutral is still a breeze.
Reviewed by Mark:
I use AMSOIL Severe Gear 75W-110 in the 6-speed transmission of my 2009 H-D Road King. The SYN-3 oil installed at the factory made the transmission noisy and hard to find neutral when it was warmed up. Since I starting using AMSOIL Severe Gear 75W-110 over 24,500+ miles ago, my transmission has stayed much quieter, shifts without "clunking" and finding neutral is still a breeze.
Reviewed by William:
I use this in my front and rear differentials. Excellent product for the money.
Reviewed by CF Racing:
Great rear end oil for drag racing rear ends
Reviewed by Chip:
This is at the upper end of a 75W-90 gear oil - right in line with the old 75W-90 rating, as modern 75W-90 synthetics are usually too thin.
Quieted down a moody 1981 Dana 44, and required a minimal amount of friction modifier for a rear Chrysler 9-1/4".
Canada
United States
Will buy again
Shifter go kart transmission oil, great way to protect the gears when push starting and throughout clutch-less shifting.