2002 Buick Regal transmission

Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 2002 BUICK REGAL
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 40,000 MILES
2002 Buick Regal mileage: 40,000 The trans. Initially had a delay when placed in drive when cold and then would grab. After warm up, the lag was gone and operated ok. A year later it still has lag when cold but operates ok until it gets completely warmed up (30 min or more) and then if seems to stumble in drive and low ranges (engage/disengage?) 2 or 3X from a standing start. This confuses the computer mixture control system so the car stumbles and or cackles until it catches up with itself. After revving the engine a few times and letting it come back to idle and placed into drive, it will sometimes not stumble. Holding brake and accelerating gently causes the car to pulsate arithmetically. It will shift and downshift ok once past the stumble. It doesn't happen in reverse. What in the transmission is causing this condition?
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Tuesday, October 19th, 2010 AT 9:53 PM

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Tiny
2CARPROS-ARCHIVES
  • MEMBER
You may have two problems. The hesitation going into drive is probably caused by the transmission converter draining fluid back into the transmission. Your stumbling problem is probably due to a lean fuel condition in the engine. Check the EGR valve, fuel filter, fuel pump, vacuum leaks, ignition timing, etc.
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Tuesday, October 19th, 2010 AT 9:55 PM

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