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

good product

Works great. Took the chatter away from the clutch pack.

Good product.. the rear in my truck feels like its a little bit smoother

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

I had to replace all of the side gears, spider gears and clutch packs in my 8.8 Ford Trak-Lok. On opening the box I was worried about this products validity, as it did not smell like a rotting half dead cats peed in the box. The stuff from Ford typically does smell wicked awful. I went ahead and used it to soak the clutch plates ahead of time, and then added the rest of the tube to the gear oil as it went into the differential housing. It seems to work fine, the rearend has not chirped, clunked or barked a tire since.

I only got to put half in and it worked on a thumping differential

Good stuff! Here is how i used it: How to change the differential fluid in a 2012 Dodge Challenger 3.6 liter. Link: https://www.youtube.com/watch?v=3HJ6zoGZy5k

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

easy to use and will quiet noises from limited slip rear end

:)