I've had the TC unlocking at 45-50mph for a while, just not driving
it enuf to work the fixes yet.

Went out to blow out some leaves from the bed, it started
unlocking/jumping all over at around 80mph. Could this be the
same issue, or is it finally leading to swap time? Generally shifts
ok.
Fluid has been changed inadvertedly a couple times (cooler hoses
and connections letting go). Last refill was last fall. Fluid looks
ok now (pale red, not bad smelly). Fluid at top of hatch.


Thanks,
Lowell
2001 stock

 

Most likely it is electrical noise.
Do a search on it.
clean all grounds. I just found the passenger battery ground-at the block was only snug.
One hand and it turned 1/2 turn.