Limited Slip Additive
#1
#3
#4
#7
Trending Topics
#8
When my 2000 F150Scab4x45.4 that I bought new had about 80k miles on it, the right rear axle seal started leaking. The traction lok had also started chattering around the corners. Since I had to drain the diff to replace the axle seal, I replaced the fluid with motorcraft synthetic and added a bottle of motorcraft modifier. The diff still chattered. I then found out about a TSB that said the fix was to replace the clutches and remove 0.010" in shims from the clutch pack to decrease the preload. The Ford parts guy told me to just add one more bottle of modifier which I did and it fixed the problem. The truck now has 150k miles on it and still works great. I sold it to a friend.
My recommendation still is to add one more bottle of modifier unless it has seen severe service. The cover will leak afterwards if you don't use the right technique with the silicon sealer gasket. I would look for a real gasket if I changed it.
My recommendation still is to add one more bottle of modifier unless it has seen severe service. The cover will leak afterwards if you don't use the right technique with the silicon sealer gasket. I would look for a real gasket if I changed it.
#10