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Old Jul 27, 2017 | 12:26 AM
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1998covettec5
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I have a 1998 with a auto changed gears from 273s to 315s 2nd to 1st down shift is fine 3rd to 2nd does not shift back up to 3rd at red line it stays on the rev limiter at 90 mph
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Old Jul 27, 2017 | 01:01 AM
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Did you have it tuned for the new gears? Thinking you have to...
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Old Jul 27, 2017 | 10:41 AM
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YEP!! You need to have the PCM tuned to properly shift the trans at the proper RPMs and other associated shift related parameters.

BC
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Old Jul 27, 2017 | 10:54 AM
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1998covettec5
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Originally Posted by Bill Curlee
YEP!! You need to have the PCM tuned to properly shift the trans at the proper RPMs and other associated shift related parameters.

BC
thank you hope you have a good day
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