K&W 402508 Trans-X Posi Trac Limited Slip Gear Oil Additive - 7 Fl Oz

good product

Followed the directions and no issues here with my 2006 Toyota Tundra

Used it with Mobil One synthetic on my 2016 Challenger and it finally quieted the beast down....

I bought this for a 2020 Ram 1500 classic. The additive seems to work but my rear end still makes an ever so slight noise upon sharp turns when accelerating, and when its cold. Now when I say it makes a noise you have to really listen for it and it only last 1 or 2seconds then its over with. And from what I have read this is a normal occurance for this type limited slip rear end. I dont remember it making the noise before the oil change, but I wasnt listening for it either, and after the oil change I was listening for it. So Im going to say its fine. The noise hasnt got any worse, and doesnt do it regularly.

I have used this product for many years in 1998 Ford Explorer XLT, V6 engine, auto transmission and does exactly what it is supposed to do in a posi-traction differential which require a limited slip additive. Differentials require service every couple of years (3-5) depending on use and mileage, as the lubricant thickens and becomes black, so its time for rear end service. Once removing the rear end cover proceed to drain and clean, apply a new rear end cover gasket to the cover and seal the differential. I squeeze in a tube of this stuff and fill with 3 quarts of the recommended synthetic gear oil for your car or truck, until the lubricant starts to pour out of the fill hole. I have never had any problems, no leaks, no noises, no shuttering, just a smooth sailing ride with something so simple and easy as part of routine maintenance every few years. Check the differential every year, fill if needed. Happy motoring!

worked good! Half a bottle for a 2020 scat pack differential No chatters with sharp / wide turns clutches grab normal I’ll buy it again . Not much else to say.

Smooth posi traction.Product works.

:)

Three stars because it probably will work for some but it didn’t fix the chatter on my F-150. The Motorcraft XL-3 stuff did though.

If your Porsche Cayenne transfer case starting to have chattering/locking up issue during cold or morning start when you turn the wheel sharp OR you noticed your rear tires wearing out way faster than the fronts, add a tube of this additive to the transfer case during the transfer case oil change. This solves the issue !