Added slip lock to rear differential gear oil when I changed it out. And it instantly felt better. No more shudder in rear differential..

OUR 3500 WAS LOCKING UP REAR END , INSTALLING SLIP LOCK SOLVED THE PROBLEM.

I generally run this product for 100,000 miles I'm currently at 400,000 miles and changed leaking axle seals as well the axe bearings are still in perfect condition. I have run this product and many other AMSOIL products for 200,00 miles in my 2001 Dodge Ram 3500 I'm super happy with the results.

You cant beat Amsoil products! Been using Amsoil for over 30 years Will never use anything else, so when I needed a limited slip additive I put this in both my Mustangs along with Amsoil severe duty gear oil. Not a sound coming from the differential. Forget all other brands, TRUST Amsoil!

works really good prevents vibration

Another great product from amsoil, stops chatter right away

A required additive in some cars, my C3 requires it so I added it in after replacing with Amsoil gear oil 75-90, it was grinding upon turning to the left, the grinding stopped after this added lubricant.

Like all Amsoil products they work great that is why all my vehicles run Amsoil in them.

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!