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

Application: 1982 Mazda pickup (manual transmission) that was hard to shift from first to second when cold. This more sllippery gear oil has improved the ease of shifting. The hard-to-shift-when-cold probllem was long standing and had been cured before with a similar product. In my last transmission oil change, the mechanic did not add a limited slip gear oil, and the problem came back. Adding this oil to the tranny resolved the problem.

trans-x posi track additive have used this for years with no bad results

works well, no chatter .

great price I assume it works like the factory stuff.

Great product for stopping or at least slowing shakes and shimmies in the transition.

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 picked this up in a pinch for my 2008 Ford Mustang GT when I was changing our the rear end gears. I couldnt get my hands on the Ford friction modifier, so I picked up a tube of this instead. I was a little skeptical because I knew nothing about it. However, is been two weeks since I put this in my differential, and everything has been just fine. I dont get any chatter from the limited slip differential. Everything feels normal with the car. I would use this again.