trans shifting early when hot

[GNocide]

like at 15-1800 rpm cruising in town
it will go 1-2-3-4 by 25 mph when hot.

when i first start it up it runs fine

however at cruise speed 45-50- it goes into OD the kicks itself back out into 3rd them back again like it cant hold it or make its mind up.

whats wrong?

 

[GNocide]

am i the only one?

help tranny gurus!

 

[cosner]

same problem

​

my stock 1987 gn is doing the exact same. Havnt figured out the problem yet either. Any ideas anyone?

 

[mikestertwo]

Your TCC solenoid is sticking?