As for the engine "jerks", I somewhat doubt that's from a transmission issue. Transmission issues, which might well be similar to a lock-up converter getting weak in locking up, can result in a shudder and with increased engine rpms under load, which is "slippage" in the "need to fix it fast" mode. Or "don't do that" mode until you get the trans fixed.
Might need to put the car on "a scope" and try to duplicate the performance issue.
Just some thoughts,
CBODY67
Might need to put the car on "a scope" and try to duplicate the performance issue.
Just some thoughts,
CBODY67