Changing the fluid this upcoming weekend first time for the truck and first time for me. I got a link in a previous thread about how to do it but it was for a F250 I've pretty much got the work part down pat. I just need some help with what all I'll need to do it. How much gear fluid etc.. Thanks - D

 

9.75 axle with factory limited slip?

Capacity is 5.5 pints. You will need 3 quarts of any brand full synthetic 75W-140 gear oil and a bottle of friction modifier from the Ford dealer. You will need basic hand tools, a drain pan, a suction gun to pump the fluid in, and either a tube of black RTV or a cover gasket (or both, your choice on how to do it). If you don't have a suction gun, you may be able to stick a hose on the bottle nozzle and do it with gravity and squeezing the bottle.

Make sure you can get the fill plug loose before you remove the cover!

 

Good deal.. Thanks much

 

What GLC said. lol.

I would add a razor blade to scrape off old gasket and a couple of rags. Not as clean of a job as an oil change. Even for a first timer its not more than a 90 min job. Only other tip is to slowly pry off cover so a you dont bend it ... The Ford Brand fluid is pricey - anything else is cheaper...

 

I cant get my fill plug loose, any ideas?

 

so im guessing we do not have a Ford 8.8" differential? I thought we did?

 

I have the 5.4L and a 9.75" rear end.

 

Tip if you can find Royal Purple, has the friction modifier in it, saves a step.

 

I'd planned to use Royal Purple anyway will it hurt if i still add the Friction Modifier from Ford?? My clutch plates are starting to shudder

 

have a rubber mallet ready

 

Use a pair of vise grips.

 

Before the vise grips... first give it a good soak with penetrating oil and let it sit a few hours...

 

Nope it won't hurt...