Question about 2003 Chevrolet Impala

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Sluggish transmission shifting , struggles after 30 mph, car has 112k miles 3400 v-6-2003 impala

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If you haven't already serviced the transmission it may help.Add some lucas transmission treatment to the fluid.If that doesn't help your issue have a repair shop diagnose the vehicle.

Posted on Jan 31, 2010

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U have a 2001 chevy blazer and it's starting to jerks when u try to hit 30 miles per hour. Can u tell me the problem.


if engine speed remains constant then your transmission is slipping , guessing? 30 mph is when the 2 to 3 gear shift is occurring , Id let a transmission expert look at it

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the vacuum modulator valve is consumming your fluid. the engine vacuum is pulling the trans fluid thru the modulator to the engine cheap fix really

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Have you tried changing the transmission filter and fluid?

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Trans starts out fine, will upshift to 2nd while in OD position but will begin to slip at about 30-35 mph. From that point it will upshift if gear shift is placed in 2 position. Doesn't seem to go past...


well,whoever did the transmission needs to look at it again.It sounds like a solenoid problem internally in the transmission.or a plug,wiring,or vacuum leak

Dec 30, 2010 | 1999 Ford Windstar

1 Answer

Transmission seems to be very sluggish. Will not shift in drive after it warms up, will only redline and will move at approx. 20 mph


Check your transmission fluid levels. Also if you have not had the transmission serviced in the last 35.000 miles. It might be time for transmission flush and filter replacement.

May 25, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Car sounds like its not shifting once I hit 30 mph.


85k is not high mileage. once you reach where it won't shift try letting go of the gas pedal completely for about 2 seconds and then push again and see if that makes it change. you may want to try to slip stop in your transmission. well if letting go of the gas pedal works you may have a problem with your modulator and i can tell you that's not cheap to fix

Mar 01, 2010 | 2004 Pontiac Grand Am

1 Answer

2003 impala will not rev past 3500 rpm in neutral


Sounds to me like transmission issue might want to have this check.............

Mar 30, 2009 | 2003 Chevrolet Impala

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