Ive been doing a lot of body work on my 90 W 150, so I havent moved it in a couple of weeks. Last week I went to start it, just because it was sitting a while, and the battery was dead.

I had to push it back a few feet to get at the engine compartment, because it was all the way up against a wall. I put it in neutral, but forgot to put the transfer case in neutral.

The truck has always leaked a little bit of oil / ATF, but I looked under it this morning and the floor was covered in ATF. The puddle looks too far back to be the transmission, so it has to be the transfer case, since the NP241 is filled with ATF.

Two questions:
1. Could I have damaged anything by not putting the transfer case in neutral?
2. I think the transmission uses ATF4+ (not dextron / mercon) fluid, but what fluid does the transfer case use? I see the fill hole, but what is the procedure for filling / how much does it take?

Thanks -Tom

 

So i found on alldata that the NP241 takes 2.2 Liters 4.6 Pints.

Looks like I can either use ATF+4 or dexron, so Im gonna stick with ATF+4 because thats what the trans takes. Hope this helps someone else out.

Still, I need to get under there and see where its actually leaking from

 

The transfer case does not have to be in neutral to move the truck, only the transmission so no you did not damage anything.

Check both the transmission and transfer case fluid level. The transmission output seal tends to leak most commonly, and the fluid will flow from the weep hole down the hump of the transfer case making it appear that the transfer case is leaking.

The transfer case could be leaking as well, but only you can decide which it is. Clean it up and check the fluid levels, shouldn't be too hard to tell.