2003 Pontiac Bonneville Transmission pops out of gear @ slo

2003 PONTIAC BONNEVILLE
91,000 MILES • 6 CYL • FWD • AUTOMATIC
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NOTAPROMIKE
I sold a friend this 03 Bonneville with 70k mikes on it. It now has 91k. Recently he describes (and I felt it also) when accelerating from a stop it sometimes seems to "pop out of gear".
The engine revs but no power is being put out thru the tranny. After a split second, it will pop back into gear and the car is being powered along once again. This also occurs when DE-accelerating- as when the car is stopping but again, only at very low speeds, under 15mph or so. I did a mini stall test with my foot on the brake and floored the accelerator for a few seconds and the clutches do not slip. The fluid is full and looks/smells fine. It has never been changed. Please help. Thanks Mike Ellis
Apr 7, 2010 at 9:52 AM
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2CARPRO JACK
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
Start with a trans service (filter and fluid).If the filter becomes clogged with clutch material it can cause what you describe.That trans should have been serviced a few times by now, so it may just need a new filter.Cheap and easy place to start since it works fine otherwise
Apr 8, 2010 at 7:59 AM
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