2000 Deville occasionally slams every gear...

[Awesund]

Hey y'all...
I searched on this problem but found nothing.

Every once in a while the car will slam-shift into all gears..."WhAm!"

It doesn't happen often at all, but it's harsh when it does.

I'm guessing it's something electrical or sensor related because if I turn the car off and back on...the problem goes away. Solenoids?
It happens about once or twice a month.

Only 72k miles.

Has anyone else experienced this? ?
If so, what's the fix?

Thanks for any help...

 

[william hulbert]

thats wierd ,dont erase your codes on dash or by unplugging batt your trans is going into safe mode not sure why, but bring to dealer,have them plug it in to see whats cooking,