I changed my rear axle fluid today, and the only fluid my parts store had was valvoline 85W-140. Is this to thick of a fluid to be running in the winter? I dont have a manual but on the back of the bottle it says it is recommended for all hypoid differentials (conventional and limited slip) where API GL-5 or MT-1 fluid is specified. My axle is a dana 60 with 3.54 gears and a factory limited slip. So is this fluid ok, and do I need to add any friction modifiers? Thanks

 

That fluid should be fine. I believe you are supposed to add a tube of special stuff if you have limited slip, but I never did on mine and never had any problems. It comes in a little tube like a oversized toothpaste tube.

 

ok well so far I have read that you need to add 4oz of the modifier, but I dont want to go buy it and put it in if the gear oil is wrong. Can I just use lucas, or does it have to be ford modifier?

 

The parts store should have it I believe. A guy gave me a tube of it he didn't need, but I never did use it.

Napa sells it. Try this link.

http://www.napaonline.com/NOLViewer/...971&ShowPics=1