Question about 1997 Chrysler Concorde

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97 concorde with 3.5 engine @ 40 to 45 mph it starts bucking .

When the car is ready to change in to passing gear it starts bucking as if its trying to chage but cant. Could this be transmission filter and fluid problem? It only does this between 40 to 45 mph and the check engine light starts flashing. What do you suggest!!!

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  • timcollins42 Jan 19, 2009

    The same thing is happening with my '96 Concorde. It also won't shift out of 2nd gear until it warms up. Once it warms up it seems to shift through all of the gears perfectly.

  • Anonymous Mar 23, 2014

    bucking at 40 mph

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Really?! The check engine light is flashing because your engine is misfiring, skipping. Fix the misfire and it will stop jerking and bucking

Posted on Oct 18, 2012

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Mine did this too, and after having it scanned at a garage, it turned out to be the speed sensor on the transmission. disconnecting the battery for a few hours might work, also. Drive car immediately after reconnecting battery, so the computer can re-learn the shifting pattern. Be sure to drive normally and let it shift through all gears, then go onto a highway and get it up over 60 MPH and punching it down now and then into passing gear. This may help, if none of the sensors are bad. If you try this and light goes out and it shifts ok for awile, then symtoms return, then you definately have a bad sensor on the tranny. There are several of them.

Posted on May 27, 2009

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Computer firmware needs upgrade

Take your car to a Chrysler dealer shop and have them update the transmission program.As your tranny wears it loses it shift point and stutters between 40 - 45 mph looking for the right gear to change to..Had same problem in 94 Concorde and 94 T&C minivan.Reprogramming tranny fixed both cars.

Posted on Apr 07, 2009

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