1999 Buick Regal erratic downshifting

Tiny
NORM_Y
  • MEMBER
  • 1999 BUICK REGAL
Transmission problem
1999 Buick Regal V8 Front Wheel Drive Automatic 150 k miles

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.
Wednesday, July 23rd, 2008 AT 11:50 AM

1 Reply

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
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.
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Wednesday, July 23rd, 2008 AT 12:16 PM

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