Customer Ratings & Reviews

Feels smoother

Do your research. This stuff is the best!

Used with friction modifier in the rear differential of our Camaro, which had been making noises during low speed parking lot turns. Now the limited slip and differential are quiet at any speed. Also used in the differentials on our quad and motorcycle. Would purchase again.

I think severe gear oil is the best gear lube out on the market it don’t break down like other gear oils since I been doing differential fluid service’s for over 35 years

This new packaging made fluid transfer so easy! Product itself works great.

I changed all fluids in my 2019 Silverado 2500 duramax. I tow 11,000lbs and wanted to keep my gears in good shape. It's been A month now and everything is running cool. I switched all my fluids to amsoil, rear and front differential, transfer case, transmission, oil and coolant. Truck is running cooler according to all gauges. I have test kitsch and will be keeping a close watch on longevity. Thanks amsoil for great, fast delivery.

Easy to use bags, Noticeably quieter gear boxes.

Another wonderful product works great!!!!

Switched from the purple company and this is a better product

I use this in my differentials and my transmissions, it has been nothing short of amazing! It's most noticeable in transmissions, with smoother engagement, easier cold-weather shifting, and keeping noise down.

Great lubricant. I can feel a difference in heat on differentials.

Best performance oil available! Best company support.

This Gear Lube has never let me down. I change it at regular intervals, despite its extended ability. Still, I know it is reducing friction and wear, and keeping the drivetrain in tip top shape.

Wow this absolutely blew my expectations! It’s a night and day difference between your traditional 80-90w.

AMSOIL Severe 75W-90 is phenomenal gear oil. I’ve ran it in my ‘01 4Runner for years now with great results, and when drained from the rear differential, it still looks like new! I’ll never use any other gear oil than this one.

Used it in my 2016 ram 2500 6.7 Cummins rear and front differential. So far it’s working great!

Love the easy fill pouches! Hands down.

I changed the gear oil in my front and rear differential and noticed that when I drove there was way less resistance due to the heavy oil I was using

Very easy to put it in.

Smooth like Butta. Gotta getcha some of this and put it in !!!