My 2007 Avalon seems to have problems shifting gears. Occasionally when I approach a stop light and apply brakes to slow the car, the car will downshift very hard and **** to a halt. When I try to accelerate, the engine revs but no movement from the car. Other times I am driving and try to accelerate to change lanes the engine revs but the car does not respond.

SOURCE: Transmission problem on 2001 Celica GT Auto Trans - how can I fix this?

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SOURCE: 2005 Toyota Transmission downshifts rough

Sounds like you need the updated engine computer for harsh shifting. Look up under the glove box at the computer. Number should be 89661-02K21 if not, you need the update. It is an 8/80 warranty item.

SOURCE: 1985 Toyota Camry sluggish acceleration

check the fuel filter and when was the last time you had a tranny service done and a tune up also check the drivebelt

SOURCE: Idle and gear shifting 1987 celica automatic

I would suggest hat you replace the timing belt. The noise that you hear is the belt.

George Fischer

• 236 Answers
• Posted on Jun 17, 2009

SOURCE: acceleration problems.

see if all of the spark plug wires are attached, if so the replace the spark plugs, if not that then replace the spark plug wires, and last replace the distribution cap