1999 Buick Regal erratic downshifting

1999 BUICK REGAL
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NORM_Y
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Transmission problem
1999 Buick Regal V8 Front Wheel Drive Automatic 150 k miles
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When in cruise control or not, when I an starting up a hill and the transmission downshifts, it immediately upshifts again causing a jerky sensation. It is as if it cant make up its mind which gear to use and I have to push the accelerator down to complete the shift.
I don't know if it is a computer/sensor problem or a transmission problem and I don't want to pay to have the wrong one worked on.
Jul 23, 2008 at 11:50 AM
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DOCFIXIT
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Check engine light come on? If so have codes pulled then post. Other possible causes lockup torque converter switch or input or output speed seensor.
All in or on the transmission.
Jul 23, 2008 at 12:16 PM
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