deadelk

1992 f150 4wd. I can see the fill plug. Are you supposed to suction the old oil out or can you remove a lower bolt to drain the diff?

arkansasmatt

There is no drain plug on the front differental its set up as a chunk I guess you could suction it out but you can loosen all the bolts halfway then after the fluid is out clean the surfaces and permatex it. I dont see a reason to change it the amount your from diff is used it would take a long time to break down the oil thats just my thoughts.

deadelk

Well the oil has been in there 20 years.

AK Outlaw

Only way to do it is to separate the TTB.

7700SCREW

No you can suck it out with a variety of tools. Some cheap and some more expensive but they all do the trick!
The cheap ones look like a big syringe.

sylver91

Ive got a handy hose like this with a hand pump, to pump in or suck out fluid. Really handy to fill my diff fluid and 5spd and I don't spill a drop