Originally Posted by Torque454
If the booster is leaking too much would that cause my trans shifting problem?
Could- if the modulator is plumbed off of a "T" shared w/the booster. Possibly even by the booster leaking vacuum enough to lower the vacuum at the port where the modulator is supplied from, but it would have to be leaking very bad- and this would make the engine run terrible, if at all- at idle, especially.
Disconnect the booster and plug the hose to see if that cures the stumble. Just remember the brakes will not be up to par. So be careful, and only do this in a safe area. But I'm betting the booster is toast and needs replaced in any event.
It could be a bad governor gear, as well. Bad gear = no shift out of first.
If it's a bad modulator, or the hose to the modulator is split or off, there will still be a shift w/enough RPM. IIRC, there will not be any shift at any RPM w/a worn out gov. gear.