NO1B4ME

All the sudden My 4x4's not workin, did a search in the forums and checked all the different replies, but this ones got Me a little stumped. If the truck has run for a short period of time the 4x4 wont engage or the light indicator will not go on, but if You let the truck sit for a little, an hour, and then fire it up, the light and the 4x4 works??????? Could it be a vacuum leak that I cannot see, I traced all hoses everywhere I could see and all are hooked up and appear to be in good shape, but how could after a rest the vacuum come on enough to engage the 4x4????? Any thoughts Yah'll would be appreciatted, thanks in advance........

rebal

sounds like the cad motor on the axle, my 01 was doing that .pull a vac. test in the two motor ports and see if it looses vac.