Quote:
Originally Posted by laxbro19
4th gear is overdrive. Mine will sometimes sit at 4000 going 70 in 3rd gear and sometimes it will shift into overdrive. Doesn't matter what temp the engine is at. Interested to see what your problem is
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Sorry I meant it down shifts into 3rd gear randomly and back into 4th randomly. I cant speak for other years but with 2nd gens I know for certain it had to be at operating temperature before the computer will even allow it to shift in to overdrive which is why I changed my CTS. Unfortunately it was all in vain. Only thing I can think of now is replacing the overdrive solenoid. Not a cheap part so I'm open to suggestions before I buy it.