Stinger Gear Box Co. recommends it in their gear boxes. I have a 640 hp. plus 150 shot of Nitrous in an Airboat. No problems and I wouldn’t run anything else. Highly recommend.
This used in the 3.64 diff in my track car. It was recommended by the shop that built the diff. I change it every season and have been very happy with the performance of this weight fluid for my application.
75w85 is hard to find locally...in fact, pretty much impossible. Even Amsoil was out of stock when I first tried to order it. But this what my F-150 calls for in both the front and rear diffs. I waited until they had it back in stock. I trush Amsoil products to provide the quality and performance equal to or exceeding any other brand. I had just had the truck's transmission fluid and filter changed at a transmission shop (that is not a diy job) and now I've changed the front and rear diff fluid plus the transfer case fluid. (Thank goodness, that stuff was black when it came out!)
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Really easy to use
By 
TORIN, 
a 
Verified Buyer 
on 
August 04, 2025
Makes no mess in tight spaces, very easy to dispense all the oil without wasting. Overall outstanding product. I’ll always buy this for my truck.
I have used Amsoil products in other vehicles, this is the first fluid change in my Jeep. The easy bag instead of a bottle made it so easy.
Let's put pure synthetic to the test.
When I changed to this recommended gear lube I was surprised that I gained 2mpg over the last change. I’ve been an Amsoil fan for 15 years now and have never looked back nor have I had a problem with doing its job.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Worth the wait, for new Tundra
By 
Maverickjdh, 
a 
Verified Buyer 
from 
San Antonio  
on 
August 03, 2025
This was out of stock for quite some time, but in the long run I was glad I waited the over a month to get it. The new Toyotas recommend doing this at 30 K depending on what the fluid looks like and after taking mine down it was definitely a good idea to do it at 30 K. So glad to be able to upgrade this hopefully much superior product because Toyota wanted way too much to do with this goodness gracious. Thanks again and oil also utilize the ATF for the transfer case and everything including install was absolutely flawless super easy with the squeeze bags. Also saves me a ton of money doing it myself and having somebody at Toyota do it who probably doesn’t really care nearly as much about whether they’re putting into it or how the service is done.
After much research and reading so many positive reviews along with it's flexible packaging making it easy to apply without a pump, the answer seemed clear. The product and price is excellent with fast delivery from my nearest supplier.
After much research and reading so many positive reviews along with it's flexible packaging making it easy to apply without a pump, the answer seemed clear. The product and price is excellent with fast delivery from my nearest supplier.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Love the easy squeeze bottle
By 
CHARLES, 
a 
Verified Buyer 
from 
New York 
on 
July 25, 2025
No mess no hassle with the easy squeeze bottles and the gear oil is outstanding 😊
I've always trusted using Amsoil products over others. Amsoil is far superior when it comes to where protection the only drawback is it's expensive but you get what you pay for
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Differential fluid, best out there.
By 
EVERETT, 
a 
Verified Buyer 
on 
July 15, 2025
Change it out and don't worry for many miles.Great product.
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