Hey all, first post. I am looking some expert opinions in a transmission problem that occurred today. I have a 2002 Tahoe (I know, wrong section but there is 5x more folks here right now) with 138,000, 5.3, automatic. Just bought the rig 2 weeks ago. I drove it to work today and at lunch with zero problems. Went to leave work and put it reverse, the truck just surged, put it in drive and the same thing. I checked the fluid, looked good and clean. No grinding noise. I had to call my wife to pick me up. Looking for opinions before I start dropping $ into a repair shop. Being that it happened upon start-up makes me wonder if its computer/electrical related? Maybe shift solenoid? Thanks! Doug