Why won't my 83 custom deluxe shift while driving?

Asked by Mar 20, 2017 at 05:40 PM about the 1983 Chevrolet C/K 10 Standard Cab LB

Question type: Maintenance & Repair

5 Answers


The transmission may be worn out by now, should go to a transmission shop for proper diagnosis.


If you're on a budget and handy, check the vacuum modulator and line to it, it's a simple enough fix that might save you a trip to a shop.


I don't think there is one on there KenF.


hmm I checked again, repair manual shows a vacuum modulator ...


Found one, I know its around the time they did a redesign. So I agree with KenF. the modulator valve or vacuum line you should check out.

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