Transmission problem
1996 Chevy Suburban V8 Four Wheel Drive Automatic 136000 miles
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My Suburban makes a hard banging noise in the drive train when I put it in reverse. I have changed two of the u-joints on the rear drive shaft, but the problem persist. Also, when I drive up a hill or in the interstate I notice a hard shifting from 1st to 2nd in the transmission. I have also noticed that I have lost a lot of torque. I did a diagnostic with the OBD II machine and it gave me a (torque converter brake b switch) code. Can you tell me what I can do to get it fixed. Thanks