Won't stay in overdrive and as soon as that starts acting up the cruise quits working.

by Scott pyle
(Highlandville mo)

It won't stay in overdrive. It seems like it can't make it's mind up if it wants fourth or overdrive. I just replaced both shift solenoids. It was acting up before the replacement and after the first trip was wonderful. But then back to the samething. The service vehicle soon light has been on the whole time. I have an OBDll reader. That gave me the code the shift solenoids were bad but the overdrive was acting up for at least a year before the code came on. I had the tranny rebuilt about two years ago in hopes of this problem being fixed but that seemed like a waste of money. It does however seem to be a correlated problem with the cruise and overdrive issue. Would the tps have any bearing?

Chris Trautman @ Corvette Assembly Plant 2019

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