1995 Chevy K2500 Light duty with 305 CI engine 155,000 miles. Recently installed a rebuilt E60 auto transmission. Truck shifts properly thru all the gears (1-Overdrive) in 2wd. 2 issues in four wheel drive that were not issues before tranny swap. 1) In 4wd low. Truck will shift from 1 to 2 manually but not by itself and truck will not shift out of 2. It stays right in 2 no matter what rpms are. (What tells the transmission when to shift and is it the same in 2wd as in 4 wd) 2) Switch on top of transfer case that sends power to front end actuator only bumps the switch in 4W low. After looking in the hole the cam is there for both low and high perhaps the switch is faulty or needs to be pusher further in 4W High. This is not a major concern I just thought I would share this in case is would help with the other issue. The transfer case was never taken apart.