Question about 1992 Jeep Cherokee Briarwood

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My 1992 Jeep 4.0 automatic wont shift into drive and overdrive.

It seems fine going around 25 mph to 35 mph but when I get to a hill or try to go higher than this there is no power and also there is a noise in the vicinity of behind the passenger glove box. Any suggestions would be helpful. Thank you Heidi

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  • heidirol Dec 17, 2008

    the noise sounds like a vacumn leak . I just took the car out and on the way to the place I was going the car wouldn't go past 35-40 mph on the highway. Fortunately, there is snow on the road so I am able to do this. However, on the way back I got on the highway and the car was able to go 50-55mph and appeared to upshift into drive, without reving up to 3000 rpms like it was before. I don't understand it? the noise sounds like a hissing leak when you first start it up but it goes away after a minute or two. My boyfriend says that it is the airconditioning pump, and it is kindof coincidental that it happened right when my shifting problem started.Could the two be related?

  • heidirol Dec 18, 2008

    I THINK THAT MAY BE IT , I AM GOING TO GO OUT AND LOOK RIGHT NOW!!!!! THANK YOU SO MUCH , I'LL LET YOU KNOW IF IT WORKS.THANK YOU

  • xxs_manxx May 11, 2010

    What does the noise sound like?

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Alot of transmissions run a small vaccum shifter. IF you are up to it, crawl under the jeep and look at the side of the tranny (should be the right side of the car, right above the tranny pan you will see it. its only 2-3 inches in diameter There is also a vacuum line running to it about 1/8th inch rubber line. Its either off or broke near the vacuum shifter.

Hope this helps, Goodluck.

Curt

Posted on Dec 17, 2008

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