ST300/Jetaway only shifts manually
#1
ST300/Jetaway only shifts manually
The automatic in my '67 Cutlass only shifts manually by shifting from low to drive. Is there an easy way to fix this, or is this a job for a transmission shop?
#2
The best way to fix this problem is to get rid of the two speed and replace it with a TurboHydro 350. Bolt in replacement.
#3
Sounds like either a vacuum leak or the modulator is shot, leading to the trans thinking the engine is WOT and not shifting when in D. I'd check the vacuum lines between the intake and modulator, and checking if the modulator will hold a vacuum. If not, I think the modulator can be replaced without dropping the trans.
#5
I probably do have a vacuum leak since I broke some of the tubules that control the A/C, but I was experiencing the problem before that. Is this what I'm looking for? https://www.ebay.com/itm/GM-Pontiac-...t/111482538193
#6
I probably do have a vacuum leak since I broke some of the tubules that control the A/C, but I was experiencing the problem before that. Is this what I'm looking for? https://www.ebay.com/itm/GM-Pontiac-...t/111482538193
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