Weird problem?
|WYG|SS
12-13-2007, 04:35 PM
Has anyone here ever had a problem where you are shifting from 1st gear to 2nd (automatic) and the car just wants to stall? arent auto transmissions run by vacumes? 91 sunbird 2.0 tbi
anomaly_va_1976
01-25-2008, 08:07 PM
Most older automatics are.... They usually have a vacuum modulator on the transmission case that uses vacuum pressure to modulate the shift (softness or stiffness) but I have never heard of a vacuum modulator causing this type of problem, however the change in vacuum when the tranmission shifts could be escalated to the point of stalling if you have broken lines or a bad modulator.
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