What's the size of the fill/drain plug's on the 4500 nv and the transfer case, one of them is a allen head bolt/plug, wasn't it on the transfer case. ----need to check the fluid levels, and I don't have the truck with me right now, I need to stop and buy one. I was thinking it was a 17mm or something like that, maybe, never mind I can't remember.

 

I recall that the drain plug on the 4500 is the bottom bolt on the PTO side plate.
-P

 

Fill plug on transfer is metric 10mm or 3/8 hex key.
Alan

 

That's the one -------thanks,