It does what it is supposed to do, prevents clutch pack sticking in posi style diffs.

This stuff works it stop the noise in 1/4 mile

Worked great

Purchased for my Wrangler. Did the trick and quieted the clutches.. Packaged great also..Would purchase again..

I had a horrible chattering in the rear end of my F150 every time I turned and accelerated. I put Amsoil slip lock in the rear diff, it took me about 2 minuets to do it and I noticed an immediate reduction in chatter. Within the first 50 miles of driving the chatter was completely gone and I have not heard it since. Excellent product and I would definitely recommend it. Probably saved me from eventually having to replace the rear end.

I have been using and oil products for years On cars, tricks, Jeep, rv, and my Harley And I see no reason to anything else!

Did it's job cheaper then my part stores

As with all other AMSOIL products that I use in everything I love it and recommend all their products to everyone who cares about their investments.

For the cost and better product than the dealership, I would highly recommend this.

I was on a vacation up on the north shore of Minnesota. I was near amsoil in Superior, WI. I was pulling a 45' 5th wheel with my 2005 f350. Before the trip I changed the rear differential fluid to amsoil severe gear. I was having some rear end chatter. I stopped into amsoil and picked up some of this and it did the trick!