1-2 shift lower then 2-3 shift

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Apr 26, 2012 | 01:06 PM

Diablozx9

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1-2 shift lower then 2-3 shift

At WOT my 1-2 shift is lower then my 2-3 shift (TH350 in 1981 C3).
My 1-2 shift is way to low (approx 3200 RPM).

Cable is fine, Modulator seems to be fine, since 2-3 shift is OK, I don't think Governor needs changing.

Any ideas ? Do you think it is shift valve springs ?
If so, where can I get a spring for 1-2 shift (and how to change) ?
Do I have to buy a whole shift kit ?

Thanks in advance.

Apr 26, 2012 | 02:28 PM

MelWff

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When you say cable is fine, does that mean you adjusted it?

Apr 26, 2012 | 02:33 PM

Diablozx9

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Yes. But if I didnt do it correctly, wouldnt the 2-3 shift be the same as the 1-2 shift anyways ?

Apr 26, 2012 | 03:25 PM

MelWff

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If you are doubting whether you did it correctly perhaps you should revisit that adjustment before making assumptions about other problems. How did you adjust it?

Apr 27, 2012 | 06:35 AM

Diablozx9

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I will try to be clearer, the cable is adjusted correctly.

I am asking what could make the 2-3 shift at WOT correct but the 1-2 shift at WOT to early.

My last statement was only to indicate that if the cable was not correct, it would still have the same effect on both gear shifts (if you know otherwise, let me know).

Can anyone address what would cause a difference in the 1-2 shift vs the 2-3 shift ?

Last edited by Diablozx9; Apr 27, 2012 at 06:37 AM.