[shamrock]

Actually this will be my third torque tube, so two failures. The first was at 2000 miles and sounded like marbles rattling around at idle. Failure was in the u-joint rubber coupling at the rear, a known and common problem. Torque tube replaced. The second was at 6500 miles and was a heavy vibration at 2200 rpm. That was a front bearing failure in the assembly. Torque tube being replaced today. I looked over the problem with the mechanic. He will check to see if alignment to the engine is off causing my vehicle to eat torque tubes, but the failures were very different. I have complained to Chevy and will pursue lemon law if it fails again. They are replacing a lot of torque tubes at my dealer.

(Attached is the picture of the failed bearing from today on the engine side of the torque tube. It should be flush with the housing and not have metal shavings around it. It is displaced back about 1/2 inch. You can see a groove it cut about halfway down. Ignore the white packing foam.).