Eddie Jackson,

There are several possibly causes for the problem you are describing. It could be caused by the Input, third clutch housing, a binding 4th clutch piston or the torque converter stator. These are just suggestions; they are not intended as a diagnosis.

It's best to have the vehicle inspected by a certified technician.

Please keep us posted on the results of your technician. If you have any questions, please feel free to contact me.

Louis
GM Customer Service