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Old 08-01-2015, 08:42 PM
Junkman Junkman is offline
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Join Date: Sep 2006
Location: Middle TN
Posts: 3,699
Originally Posted by mrbison View Post
On a gas engine the vacuum would be close to zero at full throttle so the VCV should mimic the same kind of situation. Anyone know if the VC is supposed to be at 0 when the car shifts?
Harsh shifts are a symptom of too little vacuum given the wear and settings on your particular trans. Details are in the trans manuals above. Just go through the process. Make sure the vac pump is putting out, then adjust the modulator & VCV.

Go back and fix any ancillary vacuum leaks that you have to plug in order to get the shift right. Usually the climate vac pods and possibly the door vacuum locks need attention - and can affect the trans.
85SD 240K & stopped counting. 84SD 180,000. Thinking of painting both.
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