Help! Transfer case problem?
I keep my truck in 4x4 on side streets in the winter and shift out on the well plowed main roads. Went to pull out into traffic in 4x4, took off great and half way into the intersection it dropped into 2 wheel drive. Made a loud thump noise but the 4x4 light stayed on.
I switched it out of 4x4 after and back in and it was fine the rest of the day. In the truck's defense I did hit it pretty hard taking off right before it dropped out, but I can see it being pretty dangerous to have the truck drop out of 4x4 when you aren't expecting it.
Should I be concerned? It has never done this before, had the truck in the shop a few weeks ago for a coolant flush and got my mechanic to check the transfer case fluid. He said it was full and looked clean. Any ideas? Thanks in advance guys.