Transmission not shifting

Asked by jt8326 Aug 24, 2019 at 03:41 PM about the 2002 Chevrolet Trailblazer LS 4WD

Question type: Maintenance & Repair

I've got an '02 Trailblazer. The owner we purchased it from said that he had the transmission replaced with one that had approx 80,000 miles on it.  A couple weeks ago the check engine came on and the tach shot up to 4000 rpm. I put the OBD2 on it and it coded for the VVT. I replaced it and the code cleared. It still was not shifting. I replaced both Shifting Solenoids thinking one of them was the issue, and it's still not shift. I'm at a loss as to what to check next.  

3 Answers
41,350

TDolby answered 5 years ago

What are the actually 4 digit code you have now? Installing a used Transmission is like rolling the dice. Sometimes you get one that works well and one that doesn't. Have you thought about having a transmission shop look it over?

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jt8326 answered 5 years ago

That's the thing, it's not coding at all right now. I'm trying to avoid that if possible.

Mark helpful
11,635

FJ4072 answered 5 years ago

VVT codes like P0014 are normally indicating of poor oil quality. Meaning, change your oil, and code will go away a high percentage of the time. For your tranny, a lot of us use this, hope it's your TPS! Good luck. http://twincharlotte.com/blog/30-common-4l60e-transmission-problems-repair-charlotte-nc/

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