I have a 92 dakota 4 wheel drive 3.9 magnum. I recently had to use four wheel drive because of a substantial snow. When i pull the lever, the light comes on to show it is engaged, however, i noticed only my rear wheels were spinning. I checked to see that the front drive shaft spun while engaged and didn't spin when disengaged and both checked out. This happens in 4low also. Is it my front diff? My hubs? Could one hub not engaging keep the other from engaging? PLEASE HELP! Thank you

 

Id check that out first...

http://www.walt-n-ingrid.com/modifications.html#4x4

 

holy. thats alot of reading. anytime my 4x4 takes a **** its usually one of the lines. not sure what T-case yours has, my my vac. switch oh the case, the rubber connector was all swollen and wouldnt keep any vacuum. i had to out new rubbers on it. another spot on my truck that was bad once was (V8 truck) the passenger side mani melted the tubes.

hope this helped at all.