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

Works great

A tube of this and fresh Mobil 1 diff fluid fixed my horrendous LSD chatter problem. Based on internet posts was originally looking for Ford friction modifier but have always had good luck with CRC products. Did not disappoint. Drives like a new car, doesnt fight me in turns anymore yet still locks up tight when really hit it. Replaced Royal Purple synthetic that said it had the modifier, but guess it wasnt enough.

Only need 1 tube & no chatter

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

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

This oil fixed my whaaaanning rear axel issue on my 2000 Firebird Trans Am with the 3.42 LSD. Yes, I had the GM required additive already mixed in the synthetic gear oil. Never had a problem until one day in SoCal. When my car was driving for a bit and and warmed up, from a dead stop, needing to make any basic right turn (90 degree), (or sharp turns too) The axel would produce a profound, yet awful sound that intensified thru the turn but terminated once all the wheels turning at same speed, driving straight following the turn. Ill do my best to describe my sound, what Id heard, and as accurate as possible. This was a very specific situation when the sound was emmited. Ive read similar but also different stories and this stuff resolved my problem. The noise sounded like a roaring whanning rotational sound that would whirl (or wind-up wow wow wow wow sound, intesity and pitch increased with speed) as you proceed thru the turn under acceleration. The noise would not occur with you coast thru turns or not giving her any gas at all. I can compare another sound Ive heard to my noise- almost like or similar to a sound when a manual car is going in reverse at high torque/speed or up a hill. Hope this helps everyone. This stuff worked for me. Hell yeah!

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.