khodgens

Just curious if anyone has used Lucas in their rear end? The price is good.

Martian

I used it. Worked just fine for me and still using it today.

nrivera04

Don't forget to add the friction modifier if you have a slip diff.

khodgens

Yep I ordered the motorcraft fm on line. Now I'll order the fluid and black rtv gasket maker.
Thanks!!!

khodgens

I did some further research on my 05 SCREW 4x4. The po had an independent shop change rear axle fluid 50K back. They used AMZOIL 75W90 synthetic and FM. My owners manual specifically states 75W140 synthetic w/4oz fm. Is it possible that's why I'm getting the chatter on starting and turning? I'm going back with 75W140 synthetic for sure.