I thank you for your quick response. I was away from my computer for awhile so I apologize from the slow response. I have 139,000 miles on the tahoe. The only thing that has been done so far is the normal fluid changes that are required at the proper times. No parts have ever been replaced as of yet. Anything else that you need to know please just ask. Again thank you so very much for any help you can give me.
I tried what you told me to do on the last reply and it still will not go into reverse (the transmission). The transfer case does engage and go through all of the gears (i.e.- 4low,4hi,2hi). Why will it not go into reverse without alot of grinding?
The whole problem started while we were driving on the highway doing about 55 mph in overdrive with the transfer case in 2 hi. We hit a bump in the road and the tahoe immediately started grinding a little bit. I got off the highway and started to test it out. While the car was still running I tried to back up (mind you the transfer case was not touched at all meaning it was still in 2hi) and it would not go into reverse. It just started grinding very lordly while trying to put into reverse. The transmission still works in all other forward gears. The transfer case will go from 2hi to 4hi to 4lo and back into 2hi. It just will not go into reverse no matter what I have tried without it grinding.
The transmission level is fine and not burnt. I have had in the last 4 to 5 thousand miles the transmission serviced. My question is that if the transmission shifts into forward first gear without any problems , then why does it not go into reverse. From past experiences with Chevy transmissions the first and reverse clutch packs are the same meaning that if it works in first then it should go into reverse. I work on all types of vehicles and all years from the minor oil changes to major engine overhauls. I just have not had much experience on electric actuated transfer cases. Is it possible that it could be one of the actuators or the electric actuator motor.