/6 904 transmission swap still having problems....

Hey ; firefighter

the symptom you are discribing is like a second or third gear start, witch would be caused by a hanging govenor assembly or sticking valvebody.
the easy way to tell is when it does it pull it to manual low and see if it takes
off right, if it does drive vehicle at 15 to 20 mph and do several manual 1-2 and 2-1 shiftswith shift lever , this should free up gov. or sticking v/body.

good luck; Lon Kopaska (transmission master tech) DSM. IA.