I am about to attempt an oil change, tranny drain and fill, and I would like to service the differentials and transfer case but have never done so before. I was wondering if I should just top them off or drain, and if drain, do I have to pump it out or what? Any advise would be welcome because I always find a way to screw up the simplest of mechanical tasks. From searching the forums I figure I need 6 quarts of dexron 3 ATF fluid, and 75w/140 gear oil (don't know how much), 7 quarts syn oil (thinking 10w40 but open to suggestions) and am trying to decide between the mobil 1 filter or k&n. BTW: I was planning on adding some lucas ATF additive so does that affect how much fluid I put in and should I just pour it in first and then fill?
Thanks and I know these topics have been covered (I've actually read them, I just don't remember and have spent an hour searching the forum)

 

there is a sticky on what you need and what you need to do that mike make, the 60k mile maintainence.

I drained all the fluids and put new ones in, I talked to mike and he recommended valvoline oils because of some of the additives they have. I run all synthetic valvoline oils now in everything

Also, since you have over 100k miles now, I don't think its advisable for you to do a flush of anything, just change the fluids, change the transmission filter, change the belt, hoses, you get the idea.

 

Read my sticky, then send me your tele number, I'll walk you thru how to do it.

 

Yes you will need a pump to refill the diffs and t-case, you will want 7 qts or gear lube on hand, each diff and the t-case take 2 qts, allow for spillage and what you cant get out of the pump, so have 7 on hand.
Put in your additive, then your tranny fluid.
There is a drain plug for everything on these trucks.
10w-40 is a good all around choice.

 

So, after reading my list, what else do you need to do to get your truck current?

 

I've had everything done on that list (except the tranny) but I'm really just wanting to do a thorough oil change and I need to learn how to do it so I don't get ulcers second guessing a grease jockey. I've always changed oil but have never messed with the tranny, t-case and diffs, leaving that to the "pros". Like I said, for some reason I can fix a house but not a automobile, I broke 4 tools trying to do the brake pads everyone says is a piece of cake. lol