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

Many vehicles need this, check if your project requires it. I use it when necessary and it is a great additive.

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.

Works great for my Detroit Locker

not sure if it was this or the drives haft adjustment that quieted the howl?

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

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).

good product