I am at a loss right now and looking for some help. Lost 4 wheel drive the other day. Started diving into the issue. Transfer case motor has been replaced and moves with the shifter on the dash. Hear both moves into 4high and 4 low. Truck goes into low range but no power to the front. Jacked it up and have drive shaft power. Started testing vacuum system. Have good vacuum source and past solenoid. Tested vacuum at the iwe and have 20 there as well in 2wd and 0 in 4wd. Replaced owe about 30k ago. Getting a check 4x4 on the dash. What else do i need to check or is it time to take it to a shop to scan the transmission code. 2015 XLT, 2.7
thanks

 

Spounds like time for a pro to look at it.