Vibration??

Well, replaced the motor over the course of the past week. Motor runs great; very smooth.

I still however have:

-- vibration at idle (even after setting the timing and the RPMs to spec.) once dropped into any gear.

-- hard shudder on hard acceleration, and very hard shifts. During the motor changeout I found the kickdown rod was disconnected; once reconnected, the trans will shift from 3 back into 2 at the slightest touch of the throttle at any speed under about 60 (hard to say exactly when, as the speedo has quit working...)

At high speeds, everything's fine...no vibration or shudder.

Also: there is no noise.

The replacement motor came with a trans, both described as having 44K on them. I'm thinking of first swapping out the driveshaft, then the transmission if that changes nothing.

Appreciate any input, and particularly about the torque converter.