As I mentioned, the Hydramatic, there are two rubber mounts at the front of the transmission all but disintegrated, but once I replace them this vibration started. So are you saying I need to loosen the bolts for the rubber sandwich? Could that solve the problem since it was never the two mounting pads there when I first got the truck?

Front of the transmission was all but unsupported I’m not sure how many years prior to me buying the truck, how important are these two rubber pads at the front of the transmission and if I loosen them hopefully that could be a solution, any thoughts?