Problem could also be a stuck 2-3 shift valve; only way to tell is to hook up a test gauge to the governor pressure test port, if there is more than 2 psi after coming to a stop the problem is the governor. If not, it's a stick shift valve and the VB has to come out.
Shifts normal if driving normal. Only did this after going into passing gear under full throttle then coming to a stop, starting off again and didn't upshift. Put in neutral or 1 or 2 then back in drive shifts normal again until repeating.
