I have a Chevy 1500 siverado pickup it won't shift unless I let off the pedal I replaced the tranny filter and fluid and put Lucas stop slip in it still acting up ways wrong need help please and thx

Greg Glover

Asked by May 03, 2015 at 01:39 PM about the 1988 Chevrolet C/K 1500

Question type: Maintenance & Repair

Waving my white flag

2 Answers


Check for vacuum leaks to the modulator, I believe this one still uses one as it is OBD 1. If that check good the check the kickdown cable adjustment, to maybe too tight.

Andrew Olsen

You have a 700 correct? The detent/kick down cable adjustment is crucial. If it's too tight you get late shifts and harsh shifts. If too loose you burn up the trans. It has to be adjusted to the point just a little tighter than no slack on the cable. If nobody has messed with it recently or the throttle body then it shouldn't have messed up. My honest opinion is it sounds like the governor has failed. It's under a dome plate near the tailhousing

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