Product Reviewed: SEVERE GEAR® Extreme Pressure (EP) Lubricant 75W-140 (SVO)
Current Rating: 4.92 out of 5 stars
Votes & Reviews: 77 vote(s) and 114 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 Mayberry:
The specialty shop that rebuilt my ford f-150's rear end said to use it if I didn't want to see him again. I have not been back and its been 4 years of hard towing of a camp trailer. I can say it stays clean like no other oil I have used.
Reviewed by gear head:
so far i'm impressed with Amsoil products, I would recommend Amsoil to all my freinds
Reviewed by Josh:
Bought for my 1999 F350 with limited slip. Works as expected.
Reviewed by rob:
i use it in my 9.5 mark williams with blown alky 2500 hp chevy and lenco. 6.0 qtr and never so much as ametalic flake in the oil. i change it after 40 passes
Reviewed by Falcon:
Used it in a noisy rear,definitely quited down. Also don't get the clunking like before.
Reviewed by Eric:
Switched from rp and this with l/s additive fixed my l/s issues
Reviewed by adman:
Very good quality. Replaced factory fluid after 50k, no regrets.
Reviewed by Stich:
Used after replacing pinion seal in the X. Quieted things down a bit with the howling diff. Can't put a complete seal on it being perfect but it beats the he'll out of one of the close competitors that I tried before. Due to a half shaft running a bit dry and cracked coil spring on that side. When that gets repaired I will know how well it tamed the howl. Efficiency has seen a jump in the limited driving I have done. That I can attribute to the diff fluid.
Reviewed by Rusty:
I use and Amsoil in all my machines
Reviewed by Dewey:
Very Happy I Changed over to Severe Gear Over Running Any other Oil in the Transmission... Great Feel and Friction along with heat Dissipation has Greatly Improved... Great Product
Reviewed by CY jelly:
Used this in our ford edge ptu. I needed a long lasting product as the ptu has very little capacity. Have used this in multiple differentials as well. Good stuff
Reviewed by Al:
I have been using this item since I bought my Dodge in 2007. Have seen an average about 5 mpg increases on the Hwy.
Reviewed by Al:
I have been using this item since I bought my Dodge in 2007. Have seen an average about 5 mpg increases on the Hwy.
Reviewed by 03 Indy Cobra:
I used this in a 8.8 IRS.
Reviewed by HD RIDER:
I needed to change the fluid so i went with AMSOIL because my boss used it in his race cars and swore how great it was and after changing both diffs and transfer case my truck has been getting better mileage.I am sold on AMSOIL and will be changing my whole truck over to it.
Reviewed by John:
I used this product in my differatial. Works great!!
Reviewed by John R.:
First time using this product (Severe Gear 75W-140) for this application and have the limited slip axle so I used the Slip-Lock additive. Now with 20,000kms since i serviced it with no issues.I have used the Severe Gear 75W-90 on previous trucks with no issues.
Reviewed by Sam:
I started using it in my 1977 Chevy 4 wheel drive thanks to a friend who showed it to me. I drained both axles and the 4 speed tranny and transfer case and replaced it with Amsoil.I put 15 40 motor oil in. When it got 20 below zero and colder my truck would start when a lot of others wouldn't. The gear oil I drained into a pan could be cut into cubes. A lot of guys could hardly shift there tranny. 330000 miles on my dodge with mag hi-tech differential covers and not one tiny piece of steel on the magnets.I can go about 8000 thousand miles before my Cummins uses a quart of oil.
Reviewed by Randy:
Since I've been using this in my trans, shifts are much smoother and runs quieter. Huge improvement over the dealer oil!
Reviewed by MW:
Great replacement when I was servicing a 2105 Charger. Works well with the limited slip, locks up great.
Reviewed by 67 Chevelle SS:
I bought this as usual to service the rear diff on my Chevelle SS. I've run Amsoil products in my vehicles for year and won't think of changing.
Reviewed by Bill:
Replaced diff fluid in rear of 13 f150 at 45000 Factory fluid was nasty and very dirty. Jury is out on this fluid but at 72000 now without issues....make sure you check to see if you have a limitex slip diff as you will need the additive.
Reviewed by John:
I have a Ford F-150 that had a chattering problem. Would take place after taking 10 corners. Spoke to my mechanic about the chattering, and there were two choices: replace the differential or try installing a high quality diff oil. After seeing AMSOIL on TV, decided to talk to my mechanic about using AMSOIL in the differential. Mechanic has good things to say about AMSOIL, so I decided to find a local dealer. Purchased 4 quarts of 75W-140 and the Slip Lock Additive and had my mechanic install. The chattering still existed, but not as bad as before the fluid change. By 2,500 km the chattering was gone. Thank you to AMSOIL and the AMSOIL dealer.
Reviewed by Sammie:
Everything ordered arrived before projected date and the order was complete
Reviewed by Moe:
I've been using Amsoil for 6yrs now because the product gives my car and truck the most protection and life out of my vehicles , so buy choosing severe gear oil for my truck was the right choose , Thanks Amsoil.
Reviewed by Bike mann:
I tow and the temps are low
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.