Question about 1995 Jeep Grand Cherokee

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1995 Grand Cherokee no power especially up hills

When pulling hills shifts out of od to early. Any hill pulls down to 20 - 25
mph. Level ground runs better but not like before

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  • bappleby569 Feb 05, 2009

    Found out what was wrong the catalytic converter had come apart
    inside. A piece had wedged into muffler sideways cut out and replaced with a piece of pipe now it runs great!

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  • Jeep Master
  • 6,982 Answers

You may want to check engine performance. If you have any problem with either the fuel (including filter) or ignition system (including timing chain) the transmission will react to the subsequent lack of power, in order to maximize remaining power... This includes early downshifts.
good luck

Posted on Jan 23, 2009

  • Richard Scordino Feb 05, 2009

    Like I said, engine performance! (didn't think of cat right off because usually you hear wheezing when they go bad) But, glad you found it before you went into the transmission!!! Make sure you can get away with that on inspection... or you will have a problem when it's due...(like you should listen to someone with 21/4" pipe running front to back!!!)

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Overdrive is kicking in to soon


it can, in fact newer cars do it even more.. .saves fuel....
if fact new cars have fast 1 to 4 gear jump, (no load) MPG feature.
what is it doing and when, and under what loads?????

do you mean downshifting too soon?
OD is top gear. and TCC is torque converter lockup
down shifting happens 3 ways
1: you do it. shifter.
2: low vacuum this is the Load sense, hills cause low vacuum and it down shifts.
3: TV, this is throttle valve , sensed, you stab throttle to pass.
aka; detent, TV. passing gear.
on some cars there is an OD switch to cut out OD, say pulling trailer
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and is a real pain....

btw the FSM covers all 100 A/T issues, up shifts, down, slips. flare, early ,late. ... its complex device, tend to not own them.

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