Question about 2001 Jeep Grand Cherokee

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Transmission problems? Not sure what is wrong. Looking for advice.

I bought a 2001 jeep cherokee in the summer with 172,000 miles on it and whenever I start up my car after not driving it for a while it won't changes gears immediately. I will be driving and the gear wont change until I hit 42 mph. After the gear shifts the engine will pulsate and i can watch my rpm go up and down quickly. Sometimes when I go from drive into reverse my car will take a second to change gears. There have also been instances where I have gotten to a stop sign that is at the top of a hill and my car will start to roll backwards when I take my foot off the pedal. My engine light is on and I went to have it checked at a repair shop. One place told me that it was a problem with the transmissions torque converter. Another place told me that it was my catalytic converter that needed to be changed. Any suggestions as to what it may be that is causing my car not to go into the next gear?

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  • poseylol Jan 22, 2013

    it is an automatic

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  • Jeep Master
  • 21,873 Answers

The problem could be a long list of things, including the main pump in the transmission or the torque converter.
I would need to know what the trouble codes were to advise you on that part.
I would recommend you take it to a couple of transmission shops for advice. They can test pump pressure cold and hot. The trouble codes will also help with troubleshooting.

Posted on Jan 23, 2013

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Posted on Jan 02, 2017

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leetamara
  • 702 Answers

SOURCE: Transmission wont shift into reverse

By the grayish color, fluid being thick, and metal shavings, the clutches are pretty much worn out. It's time to either rebuilding your transmission or just installing a good used one. The fluid normally should be a reddish color. The gray is from the actual clutch material going away.

Posted on Aug 17, 2008

Mikey108
  • 475 Answers

SOURCE: Jeep erradic in shifting

Check the adjustment on the brake switch. If the brake switch is not seated properly it will engage when hitting bumps and tell the tranny to come out of overdrive.

Posted on Feb 16, 2009

  • 6982 Answers

SOURCE: TRANSMISSION

sounds like either a bad speed sensor or controller. shift points are too high, should be at 2000 or slightly less. if fluid is good and clean and shifts do not flair, check those control units. Not sure about calibrate...could mean out of calibration...Id ask
another tech about that. (i don't know everything!)

Posted on Mar 12, 2009

csmock132
  • 4669 Answers

SOURCE: 2004 Jeep Wrangler - Clunking Noise when shifting out of Park

It could be lash in the differential which is normal, but it could also be a loose u-joint in the driveshaft. Check the rear driveshaft u-joints.

Posted on Mar 12, 2009

  • 6982 Answers

SOURCE: transmission wont shift until about 4000rpms from 1st to 2nd gea

Have a code check done and see if speed sensor or controller is working properly. if bought from a dealer, get it back there asap...they can't sell it in that condition!!...No test drive before you ploped down your money?

Posted on Apr 17, 2009

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1 Answer

2001 Jeep grand cherokee doesn't shift out of second once engine gets warm.


2001 no engine stated. sad.
welcome to computer shifted gear box.
its called a TCM
it does all shifting
so scan the PCM and see why
you cant fix modern cars lacking a scan tool

the engine is misfiring, has 50 causes.
it not the transmission
transmissions can only shift up if the engine makes full power.
it's not making full power, fix the engine, EFI
scan it. ok?



we have posted misfire posts here 100s of time's in fact its endless..
short list.
full tuneup done.
engine gets to 180f and not running cold all the time, scan it to see that. (data scans)

ECT reads 180f.? good or above. and holds
ECT reads low but thermal gun shows say 180f
oops ECT is bad.

no DTC errors stored?, I bet there are.
4.0L coil pack bad?
sparks are new you said.
fuel pressure way too high.?

to scan it , drive to driving cycles.
many errors are not reported with just one drive cycle.
Misfire, errors, DTC P030x , takes 2 full driving cycles , cold to hot engine, and more rules, read misfire, monitor rules in SM.


The engine light starts flashing

that means the EFI system detects gross misfiring
the flashing part means, if you read the opr guide, or SM
that its my damage the CAT converter, due to overheating, it.
it says, there, drive easy to service shop.

the lamp also means and proves the errors
are there stored in the ECU memory called DTC errors.

but if you keep doing driving cycles, they can clear , causes this evidence to erase.
fools many folks this auto clear features.

owning a real scan tool avoids all this , dancing about.

Mar 11, 2017 | 2001 Jeep Grand Cherokee

1 Answer

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Sound like its in transmission.. Did you have sensors checked,could be the problem..

Aug 16, 2012 | 2001 Jeep Grand Cherokee

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I would start by pulling a spark plug and looking at condition. With that kind of mileage, has it ever had a valve job? Valve's burn and valve springs get weak, could have a carbon problem. Also compare the brands of fuel you're using, many have changed their formulas - I've noticed it with my own cars. Also have your mechanic do a compression test.

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Your problem is the forth Jeep I have seen like this in the past 2 months.

To check your climate control system for fault codes do this:

-Turn key to 'on'
-press and hold 'a/c' and 'recirc' buttons and turn drivers side temp knob clockwise one click.

Now the display will show 0 if no codes are present or one or more numbers if something is wrong.

You can check what these codes mean here: http://www.wjjeeps.com/climate.htm

Reply back with results.

It

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