Wobble in the suspension

[luvbowties]

Sorry, did not read complete thread, but are you still using the same torque convertor that was in it when you bought the truck? Easy to rule out by sliding tranny back a tad and unbolting flywheel from t-convertor. Then start engine and speed it up to the rpm-range where wobble occurs. We recently found an unbalanced "new" t-convertor that came with a "newly" rebuilt trans.--when we reached wobble-rpm, there was no more wobble. Seller agreed, made it good, and eliminated all the "wobble".

Just another guess.
Sam