How often do you change your Front/Rear Differential Fluid?

Go online at your truck manufacturer. You should be able to down load any manual you need.

I have the manual for my F150 in the glove box, however I downloaded a copy and it resides on my computer.

This way, I can look up stuff should I have a question and I'm in the house.

ParkCountry wrote:
Thanks, All, for your replies so far! For the record, I misplaced the Diesel Supplement for my truck and have looked and looked, to no avail. I've been feeling a bit "naked" without that thing, thus having to ask the community.