Question about 1989 Mercury Sable

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89 mercury sable not shifting

The car doesnt shift, driving in the lowest gear drives the fastest about 35-40 mph running rpm high drive and overdrive goes about 25mph. please help trouble shoot thanks some one said it could be catlyicst converter.
thanks Kevin

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  • Anonymous Mar 14, 2014

    why does the engine rpm go so high for the car to shift into third

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  • 33 Answers

It is definitely not your catalytic converter since that is a part on your exhaust used to burn off any fuel that wasn't ignited in the engine.

Are you able to change the gears using the 1 and 2 on the shifter?

If not your transmission is most likely toast and you should get it replaced.

If you are able to, it is a problem with your computer and you will need to have it re-programmed.

Either way you should have your mechanic service it as soon as possible.

Posted on Feb 11, 2009

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Hello. Welcome to FixYa. I am Toyota Ed, and I will be assisting you today.

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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I hope my assistance answers your question.

Thanks for choosing FixYa today!

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