Question about 1989 Chevrolet Suburban

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Engine RPM too high when transmission shifts. Bangs into gear.

Engine gets to a high RPM before it shifts into the next gear. The transmission engages into the next gear and bangs the drivetrain very hard. Second gear has the same problem, but the shifting into second is not as severe. Shifting into third is almost normal. Agressively slowing the car down will cause a downshift slamming into first from second.
Any help with this problem would be appreciated.

Thanks, Mike Crowley

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  • 7 more comments 
  • mike497 Jan 31, 2009

    Same problem/year/make/model. Not the fluid...any other ideas?

  • Anthony Diodati
    Anthony Diodati Sep 16, 2012

    There is no way to check the fluid.

  • Anonymous Mar 16, 2014

    hard shift into second gear

  • Anonymous Mar 16, 2014

    Engine won't shift in to gear until you rev the engine at high rpm. Then it shifts fine threw every gear until you come to a complete stop

  • Anonymous Mar 16, 2014

    1st gear high rpm before shifting

  • Anonymous Mar 21, 2014

    automatic transmission doesn't want to shift into gears have to do it manualy and still doesn't shift into high gear or get over 50 mhr. could it be a result of a bad powertran control moduler?

  • Anonymous Mar 21, 2014

    I just changed the plugs wires ect. on my 99 chevy s-10. It helped over all with the take off and exceleration. However, It is still revs high before shifting gears. I let up a little off the gas and it goes no problem. Please tell me it is anything but transmission.

  • Anonymous Mar 23, 2014

    car does not drive in overdrive and shifts hard from second gear to third gear. also rpm is high

  • Anonymous Mar 25, 2014

    Tride dif throttle body and pcm

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Check your fluid level when the car is warmed up

Posted on Dec 05, 2008

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The Overdrive function allows the transmission to shift an extra time, sort of like selecting 5th gear in a 5 speed manual transmission. The Overdrive, when used, will save you gas, as the engine is no longer maintaining a high RPM at normal driving speed. Look at the tach whilst driving about 45 mph, and engage/disengage the OD. You will see the tach RPM raise when the OD is off.
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