2001 Pontiac Grand Am transmission jumps into geer

2001 PONTIAC GRAND AM
50,000 MILES • V8 • 2WD • AUTOMATIC
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AL WESTON
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one mechanic said that the computer regulates when the trans should shift and that we need a new computer but another mechanic never heard of this. Can you tell me the answer. Also not sure on the difference between automatic and manual trans---this car does not have a clutch--its your basic prndl thanks al
Oct 24, 2009 at 8:45 AM
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MMPRINCE4000
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Shifting is controlled by PCM, but that does not mean you need a new PCM.

If you are having shifting problems, it could be a shift solenoid, low fluid level etc.

Have a trans shop diagnosis problem, but check fluid level first.
Oct 24, 2009 at 10:07 AM