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

Used it with Mobil One synthetic on my 2016 Challenger and it finally quieted the beast down....

Diff sounds good

Three stars because it probably will work for some but it didn’t fix the chatter on my F-150. The Motorcraft XL-3 stuff did though.

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

This trans-x limited slip additive works very, very well in place of factory additives/modifiers. I had put this fluid in my 04 Chevy Express 3500 with the big ole 14 bolt rear end, and all the chattering that was going on was taken care of after throwing this stuff in during a fluid change. Its very well priced and seems to work just as well as comparable OEM fluids.

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.

Seems to be working as expected. Only been installed for about 500 miles.

Stopped my rearend chatter.

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

Great product