My 1990 k1500 has a new crate tranny and crate motor I installed.I kept the old transfer case with a posi lok.I just put in the tranny and now my 4x4 light doesn't come one and I know the posi lok is working.I even removed it and pushed inside were the posi lok goes and the 4x4 light doesn't come on.Now I don't think I used my posi lok even before the new tranny install since about a year,but it worked.I also jacked up all 4 wheels and the front wheels don't spin in 4x4.I know my driver side front axle has a ripped boot if that matters.The drive shafts both move in 4x4.Fresh oil and no leaks in everything.I'm stumped.Maybe the axles are shot or the front diff.Any way I can test this? Also I jumped the switch wires with the posi lok engaged and the 4x4 light still doesn't work.Fuse is good.With all wheels off the ground in 4x4 nutral the front wheels spin easy by hand not affecting the rear tires.Same if I spin the rears. the fronts don't move.Please help.