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

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.

great price I assume it works like the factory stuff.

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

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

Easy to get into rear diff with the package design

It is in the axle and the gears are turning. No noises, thumping, or cracking, so it must be working.

Installed new gears which I purchased here and since my 67 GTO has Safe-T-Track, it requires this additive. Works as it should, just pour the complete contents into the rear end prior to filling with fluid. This helps it mix itself when you add the diff. fluid (which I also purchased here).

This stuff works!!!, My rear diff. in my 04 gmc yukon 5.3 L had a whinning sound when making sharp turns, I had the fluid in the pumpkin replaced a few days ago and it was still making the whining noise going into a sharp turn so i picked this stuff up at a auto parts store in my area , i had not heard about this stuff prior to buying it, but wanted to give it a try at only 8 bucks a tube, so i added some to the fill hole on the rear diff and drove about 20 miles to mix the additive with the rear diff fluid, well and i also went into a parking lot and made some sharp turns and presto noooo more noise!!!! im a happy camper!! I wanted to give this stuff 5 stars because im that impressed, but i`ll see how long it holds up.

Got rid of the stutter in the rear end of my Expedition when going around corners. I added the entire tube when I installed new bearings and seals in my axle.

Smooth posi traction.Product works.