Years ago I bought a 1991 Nissan Pathfinder 4x4 and changed the rear differential fluid. I had metal noise chatter. Found out I needed a slip lock fluid Added Amsoil and within 1 day of driving around town a couple of times, problem fixed. I change the rear differential fluid every 50k miles and always add the Amsoil Slip Lock.

Added a Banks diff cover. Upgraded to Amsoil 75-90 and the slip lock.

Used this on my 2014 Jeep Grand Cherokee SRT with 50k miles along with Amsoil 75W-90 severe gear oil in the rear differential. After an over 1k mile road trip, my truck is nice and smooth. Thanks Amsoil for your superior products!!! Customer for life

I add this to my CTSV, along with severe gear 75w90. Helps keep the whining down

Added this with Amsoil severe gear 75-90 oil no slip silent and smooth . Thanks again Amsoil .

My '92 Alfa Romeo Spider had the typical grind with 1st to 2nd upshifts, all upshift needed to be slow, and all downshifts were nearly impossible without a terrible grinding. I knew the lube specifications for the Alfa transmission are important and expected the last transmission service was not done with the right gear lube. I added a 4 oz tube of slip lock to the tranny and now the synchros work like a charm. No grind on any upshift and even quick downshifts are smooth, thanks to Slip Lock.

No issues since I have been using it.

Used this in rear differential change along with the severe gear 75-90 and its amazing at much difference its made swapping to amsoil! Will never again use any other brand in my ss camaro.

With GM’s limited split setup. Nothing is better than this product for the smoothest operation All I can say is use it and see for yourself

Good product showed up quick easy to use

Great product, used with Sever Gear 75w90 to quiet rear dif gear whine on a Charger Scat Pack.

Works well in the dif, added to amsoil severe 75-80. The car just glides

used this a number of times.nothing else on the market comes close

Used this product for a 12 bolt Eaton posi differential in a 69 Camaro with carbon clutch discs for added insurance with the severe gear 75w-90 weight. Everything is nice and quiet no chatter at all. I have full confidence in this additive.

Easy to use, no measuring, tube works great

Use this in replacement for Ford motorcraft in my '19 GT350 and Severe Gear. No chatter. Works excellent.

Works better than the OEM product in keeping by locker rear end smooth and quiet.

I have to use this with the severe gear synthetic gear lube SAE 75w-90. In my 2016 Power Wagon. I have always used this product in my truck I now have over 120k miles and have never had any issues with my forward or aft differential. Hopefully I'll get another 120k out of her.

Slip lock along with severe gear oil got rid of chatter in rear end.

Excellent product rear rear end running smoother and quiet