Hi Alan,
When you hit a bump are you sure its the
transmission that's causing the stumble? Do your gauges fluctuate when
this happens? I would venture a guess that there is a loose or corroded fuseable
link or ground that is causing the problem. With the car running carefully start
tugging on different wiring harnesses to see if you can duplicate the problem.
Around the battery area is especially suspect on these.
Stevan Miner
Miner Auto Service
Winnebago, MN
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