Customer Ratings & Reviews

Used this to replace the rear differential fluid on my 1999 GMC Sierra 1500 RWD and man what a difference. Immediate noticeable difference in smoothness of power transfer as well as easy movement at highway speeds 80+. All in all I would highly recommend this product as a replacement and considerable upgrade for any application.

Any of my vehicles that use this viscosity I use Amsoil gear oil. 2017 Ram 3500, 2019 Jeep JL, 1996 Tacoma

Routine diff changes, worked well before works well after. The guys really interested in differences in lubricant formulas seem to land on amsoil products often.

I do this fluid in my axles every 30,000. No signs of wear. Fluid is always clean no burnt smell and trucks tight and strong 94,000 miles

I could tell the difference accelerating and hauling a trailer with quads up the mountains. It feels like it gave my truck more power. I would definitely recommend this product and I'll be purchasing Amsoil again!

Works great in my 2004 Jeep Grand Cherokee limited for the front and rear differentials. I like how it comes with friction modifiers already added.

It was a great experience from ordering to receive to pouring in the product easy without having to use a pump

I have used this in my Harley’s and find it makes rhe gear shifting smoother than using Harley 20w50 oil in transmission.

Just swapped into my GMC and the job was so much easier with these bags not having to pump or figure out some crazy way to refill my front and rear differential especially in limited space.

Shipping was quick. Containers make it easy to put gear live in differential without getting other tools dirty.

I like their oil. I use this stuff exclusively. I live remote so easy to order and fast shipping.

Have used severe gear in my 4x4 vehicles. Nothing else touches my gears! HIGHLY recommend.

After using the other products from Amsoil I wouldn't think of putting anything else in my truck.

I installed a Banks Ram Air Differential cover and Amsoil 75/140 Synthetic. I am looking forward to lower temps while towing 22K across country.

Believe in the technology, have use it in my last 3 vehicles.

So far so good. Sent right to the house and no issues. I did not get my free gift thought. I am still waiting on a funnel

Best on the market

I have been using Amsoil for my engine and decided to use this gear lube when I upgraded my rear diff cover. I love the easy pour bags.

Recently drained differential for regular servicing and used amsoil this time and am very happy with the pouches which helped

Great product. Very easy online ordering. Timely delivery. Ordered extra product and shipping back to WI was costly so I attempted to exchange at local Omaha, NE retail outlet and purchase $120 of engine oil but the retail store refused to exchange a $20 gear oil for a much larger purchase.