Camaro won't downshift into second over 35 mph. Could it be tps?

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Swapped the tps into my ta and it works fine. Any other ideas?

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Original transmission?

Frank

 

No it was just rebuilt recently

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Did they rebuild your unit or sell you a different trans?

Frank

 

It was a unit i bought off Ebay rebuilt. It was junk, had it rebuilt again. It was a stock rebuild with a shift kit. Probably not a good idea.

It worked fine.

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Most likely, you have a '96-up trans in the car. GM changed the downshift strategy in '96. It was different than the '95. They have a different resistance downshift solenoid, valve body, and separator plate.

Frank

 

It didn't do it when it was in my ta.

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And it was fine in the Camaro until it sat for 7 months.

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Any codes?

 

Clean the maf and reset the pcm. Mine does that occasionally when the maf gets contaminated.