2005 Chevy Impala banging when changing gears sometimes

2005 CHEVROLET IMPALA
49,000 MILES • 6 CYL • FWD • AUTOMATIC
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KING KOOPA
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recently my 2005 impala started to make like a small banging sound when shifting into 3rd and 4th gear. it only does this everyone in a while but when it starts it doesnt stop until the car has been shut off for a while then it drives fine. this problem is becoming more frequent and just curious about what i should do. i have scheduled an appt. to change the fluid and get tuned up. what are your suggestions?
Feb 4, 2009 at 7:26 PM
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JACOBANDNICKOLAS
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Hi:
The trans service may help, but the tune up won't. The car may have a broken motor mount or trans mount. Have a helper put the car in drive, and with their foot on the brake so the car doesn't move, give it a little gas while you watch the engine to see if it moves up excessively. Do the same in reverse and let me know what you find.

Joe
Feb 5, 2009 at 1:43 PM