Originally Posted by C-10
Pull the pan first, see if the TV valve is stuck 'in'. The valve behind the aluminum plunger can sometimes stick. This will cause the pressure to be sky high, making the trans think it's WOT.
If the TV linkage is broken, same thing, the TV check ball will seat and the pressure will max out.
It's in the valvebody, shouldn't have to yank the trans.
You were right on the money! a friend came by today that is good with trannys and it was stuck. cleaned it up and it works fine now.