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www.cargurus.com > Questions > Chevrolet > Cavalier
CarGurusDec 19, 2012 - And while driving loud thump when car motor shifts th... ... Bad throttle position sensor can trip both lights and make the transmission shift at high rpms and shift hard even under light acceleration. .... the transmission will shift hard when firstput into reverse or drive ... 2004 Chevrolet Cavalier LS For Sale.Missing: mitsubishi eclipse
On a newer car this is a mode the transmission goes into when there is a bad problem with the transmission. It will usually go into 2nd gear where you can drive it safely to get it checked out but will not shift into any other forward gears.
Worn ujoint?? worn pinon gear in rear end? idle set to high,or trans itself. does it klunk from 1st to reverse or all shifts...all shifts i'd guess transmission..
Who care about the Service soon light,since you stated you are a 1993 you are OBD 1,this is not a bad thing but if you pulled a code it would probable read 02 lean bank 1, The real problem is the whole transmission,Wont rev higher in other word its slipping,need to rev higher just to start moving ,well its slipping the solution is a rebuilt transmission,or a better car.
Take your car to a mechanic or your local auto parts superstore and have them read/scan the codes for the reason for the check engine light. A good place to start.
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