My guess is that a sensor is telling the computer wrong information.
Sounds like a problem I once had on a Bronco. All caused by sensors.
The Bronco had a noisy 'PRNDL' (pronounced Prin-del) switch that told
the computer to change gears. There was also a faulty 'Throttle
Positioning Sensor' providing mis-information on how much throttle was
These faulty sensors were detected by a Transmission shop that had a
some test equipment that defined the faults. The cost for everything
was about $200. The transmission worked perfectly after the sensor
replacements. If your transmission shop is 'shotgunning' the fix, you
might search for a shop with the proper test equipment.
: my transmission began to start jumping when just cruising @ a moderate
: speed so i had it rebuilt. Less than 24 hours later from getting the
: back from the trans people, it began to do the same thing and all of a
: sudden while goin down the highway bout 60 it sounded like the trans
: just coming to pieces and then it just shut down and would barely
: and wouldnt reverse @ all. They picked the truck back up and said it
: looked like someone just threw the truck into park while goin down the
: highway. They fixed it again and said she was good to go but then here
: again less than 24 hours later it started the jerking again. They say
: there's no way its the trans. They think its the computer. The
: case looks fine but the 4wd light is on. What in the hell is goin on
: what are the chances the two issues are related?