Transfer case - Noob Question

[bsteab0yz]

Hi all - I have a very leaky transfer case... coming from somewhere on top... assuming gasket is bad. My understanding of a transfer case is that is engages the back axel for 4WD. If I only drive in 2H, do I still need the functionality of the transfer case? Or can I drain it and call it a day? Wasn't sure if it was doing anything when NOT in 4WD.

Thanks and sorry for a basic question

 

[gnpenning]

No you can't drain it and be good. It's turning anytime you are moving and the bearings need oil.

It engages the front drive line to give you 4wd. It is selectable for 4 low and neutral as well.

 

[Broncobowsher]

Need oil in it.
While in 2WD you only have power going straight through, you still have gears in mesh (just not transmitting power), bearing, and even seals that need lube and cooling. The rear output bearings have a preload to them and need cooling oil. Ask someone who burned up a transfer case while flat towing if it is possible to kill a transfer case with no power going through it. The answer is yes, it will die a painful death.