Question about 1989 Jeep Cherokee

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I have a 1997 Jeep Grand Cherokee automatic 168000 miles that just had the PCM replaced. Now the transmission doesn't want to shift going uphill. Really boggs down. Going 80 then uphill maybe 30 mph

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I would check the tps and the speed sensor.

Posted on Aug 15, 2010


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check fuses first
then scan the PCM for errors.
the PCM will in fact not allow 0D if there are problems related to PCM or engine loads wrong.

Dec 13, 2015 | 1997 Jeep Grand Cherokee

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97 jeep cherokee automatic transmission hard to shifting gears

several pos causes. 1 dirty fluid/filter 2 improperly adj. throttle cable 3 bad pcm 4 low fluid/ hot

Mar 06, 2013 | 1997 Jeep Grand Cherokee

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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

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1994 jeep 42re transmission shifting problem

I'm having a problem with my tranny not wanting to shift automatically at all. Seems like a dead stop its stuck in low gear. Have to manually shift and does not go into overdrive. I have a 1993 Jeep Grand Cherokee. Can anyone help me cause I've swiched out throttle control sensor, filter change, new tranny cooler and heavy duty lines. I'm at a loss and scratching my head. Any advice would be greatly appreciated

Sep 22, 2012 | 1994 Jeep Grand Cherokee

1 Answer

What are the symptoms of a speed sensor going bad on a 1997 jeep grand cherokee laredo 6 cyl.

Since alot of things rely on data from the speed sensor you will "usually" get an ABS alarm, little or no shifting,no indication of speed on the speedometer, and the check engine light. without the abs light and with a speed indicated I would lean toward a transmission problem

Nov 10, 2011 | 1997 Jeep Grand Cherokee

1 Answer

Have a '93 Jeep Grand Cherokee, 4WD, 5.2L, 8 cyl, automatic that's not shifting. Transmission fluid looks good, no burnt smell, no metal bits in fluid, no grinding gears. Won't shift til you...

If the transmission will not go into gear or has trouble finding gears and has the proper amount of fluid, the shifting linkage could be bent or misaligned, especially on automatic models. The linkage can be found on the driver side of the transmission, toward the top of the unit. Inspect it to make sure the components aren't bent or broken and have someone shift the Grand Cherokee while you watch from underneath. Most times, only minor adjustments are necessary.
Also, check Torque Converter and scanned the TCM (Trans Control Module) to know if some fault code is stored there.

Jul 20, 2011 | 1993 Jeep Grand Cherokee

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1997 Jeep Grand Cherokee Laredo. While driving, I can feel hesitation in the gas peddle. Starving for fuel. I put on the brake at a stop light and the vehicle dies. Next either it will start immediately...

while its idling try wiggling the three large wires going into the pcm. if it stalls you need a pcm because inside solder joints are broken. common problem

Aug 01, 2017 | 1997 Jeep Grand Cherokee

1 Answer

I have a 1996 jeep grand cherokee limited. when you first get in the car and drive it drives fine then all the sudden it will act like it is not in gear. no lights will come up. when i slowed down it...

Check the oil levels in the transmission, if it is low, this will stop the gears engaging, hence not driving at all, this is a safety mechanism on the transmission, DO NOT OVER FILL IT WITH OIL, this will destroy the transmission

Feb 04, 2010 | 1996 Jeep Grand Cherokee

1 Answer

My 1993 grand cherokee v8 automatic jeep selects gear 1 and 2, it does not select 3 and 4 pls help thanks

In automatic transmissions the second to third syncronizers always seem to go bad first, the syncronizers are worn, bad or gone. This is common in these transmissions. Also you might check your trans fluid level, sometimes a low level will cause the transmission not to shift correctly.

Jul 03, 2009 | 1997 Jeep Grand Cherokee

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