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Jeep Grand Cherokee Transmission Problems



  • This is what the problem is that the trans shop or stealership wont tell ya.
    Nobody on these forums can figure it out because i had the very same problem and all they can say is rebuild. Bullcrap!
    What it is,is a pluged trans line and or radiator. On one of the lines between the radiator and the trans lines is a check valve that gets plugged. Which causes the radiator to also plug. It is a very easy fix with a air compressor. I changed every sensor and silinoids and still the same problem. The OD light would come on and about a couple of miles later the trans overtemp light would com on. The reason is the fluid isnt flowing through the radiator and it takes a while to overheat the trans.

    So undo the trans lines at the radiator and on the trans a
    nd aslo take that check valve off the line and see if that little ball bearing is stuck. blow air through the lines and through the radiator and also the check valve and you will find why your trans is throwing codes and overheating!!

    I spent alot of meaningless money to find this out. Hope this helps dont rebuild
    ,rethink!! Mark
  • I bet you burn out anther speed sensor because mine was doing that also.
    That sensor is burning out because the trans is getting to hot.
    from Mark
  • This is because when he replace the radiator he bypassed or took out the little check valve thats in the one of the two lines that goes to the the radiator, Im willing to bet because thats what that valve is for. Or its a bad check valve. Transmission shops will take that little valve out when they rebuild and upgrade your shift kit
    It is right up front and easy to get at . And causes alot of trouble as you can see on this forum. Mark
  • ajs122ajs122 Posts: 10
    does anyone know if the new 8 speed transmission will be used for JGC and if so when? TIA
  • Ahhh, I never would have thought of that, I am going to look at this tonight if it does not chill down too much! Spent all of two hours getting a coolant sensor off and finding out it was not that either! Uggg, never another non-Jeep person again! Thanks for the info, I hope it is the valve, I am getting sick of this issue!
  • when im in idle and i go to take off my 93 jeep grand cherokee into first gear my jeep does a shake hard if i hit the gas to hard but if i back of the gas its fine does anyone know what this might be i'm thinking transmission but thats the only problems it does tranmission wise it shifts fine runs good picks up speed so i'm kinda losr
  • i have a 02 grand cherokee 2.7 crd. it will not come out of first gear, after a mile run when it happened the gearbox is to hot to touch, plus the park light is staying on.
  • Does anyone know specifically which of the hoses coming into the radiator house the tranny check valve on a 1999 4.7?
  • I have a 02 Jeep Grand Cherokee Laredo with 130k miles. There have been some issue the past couple months. The transmission seal leaked. Got the seal and the filters replaced. Then, the front crank shaft seal sprung a leak. Got that replaced too. Now, the transmission is not engaging while shifting into reverse or while in drive. For instance, when I am stopped at a light, in drive, light turns green to go, pushing the gas only causes the RPM's to raise. I have to let off the gas, put it back in park, back in drive and then the transmission engages. While stopped, the transmission acts as a manual, I roll back when letting off the brake, instead of creeping forwards.
    Any ides???
    Thank you!!
  • To add to the above...on my way home from work, I was stopped at a light when it turned green, I gave it gas to go and the transmission didn't engage. As I left off the gas and the RPM's got to about 1200, the transmission slammed into 1st. Check engine light came on with code P0700. With doing some researching online, it could be the transmission control module or the electronic shifter module. Any ideas?
    Headed to the dealer in the morning...I suppose.
  • nnealnneal Posts: 72
    This is from the wjjeeps website on code P0700:

    "This code indicates that the EATX (Transmission controller) has an active fault and has illuminated the MIL via a BUS message. The specific fault must be acquired from the EATX via a DRBIII tool. (Input or Output Speed Sensor failures often cause this code and are a common failure part on WJ Grand Cherokees)."

    Mainly it means the transmission control module has sensed a bad part hence setting a trouble code. Normally the dealer would read the TCM to learn more about what codes it picked up.
  • Hi Everyone

    I have got a 95 Grand Cherokee Limited 5.2 awd. I am having trouble with my transmission releasing when i am coming to a stop. sometimes i have to kick it into neutral to get it to disengage. Then when i go from a stopped position it doesn't want automatically engage. I have to punch the gas to get it to move. The transmission will also sometime disengage when stopped. Any thoughts would be great Thank you
  • nnealnneal Posts: 72
    Once it's locked and you move it to 1st gear, does it release and take off? I had a similar problem on my 98 Cherokee. Apparently when coming to a stop it wouldn't release from second gear and felt like it was "froze up". In my case it turned out to be a bad solenoid valve in the tranny. Would be worth checking the speed sensors too. Beware of dealers or transmission shops as my experience with these resulted in being told I needed a rebuild. I'm still driving that non-rebuilt transmission today.
  • Hello!
    Thank you for the reply.
    The cause was the filter in the transmission. It was loose after being replaced at a different shop. The dealers did a transmission flush and replaced the filter and the seal. The first shop used a after market filter which didn't fit right.
  • jeepboy01jeepboy01 Posts: 2
    edited December 2011
    Hi all, I have a 96 grand cherokee with the 4.0l. The problem is when you take off it seems to launch in second and i was going probably 5 mph when i saw a car crawling up on me, i gunned it and it stayed in second. Can anyone help? I don't want to take the tranny apart to get to the shift selenoids if that isn't even the problem. Any suggestions would be appreciated.
  • i have 2000 GC which is same tranny and dif Trans Control module. I believe I'm having the same problem. stalls if i stop sharply. i think it's either the torque converter staying locked. Please post if you find out anything about this problem and I will do the same
  • The 2012 with the 3.6 liter V6 does the same thing! LOL I have test driven 3 different cars at 2 dealers and they all hung up in 1st gear and then after about 20 seconds, slid into second. This was under modest throttle pressure pulling away from a light with the salesman in the car. He said that was normal. What??? I kept my 2004 Grand Cherokee. I am not paying $30K for this performance.
  • I have a JGC 2004 Limited Edition and lately when i go down the highway and hit a bump or dip like when you go over a bridge my tranny slips for a couple seconds??? it seems to be getting worse, anyone have any ideas???
    thank you
  • I own a 2008 Grand Cherokee with the 3.7 litre engine. The vehicle has 32k and has been running fine up until a month ago. About once a week the transmission will not shift out of second gear upon a normal acceleration. It appears to happen more frequently when the first is "cold" rather than after driving a while. If you stop the vehicle and resume driving again the transmission will shifting normally. Can anyone help?
  • I have a 97 jeep grand cherokee that is doing the same thing, only mine does it from 1st to 2nd and 2nd to 3rd. No limp mode, no codes, no check engine light. Have driven it at interstate speeds with the problem. Did a filter change, and a tranny flush. Changed the vehicle speed sensor, also changed the $140 pressure sensor in the pan. Still same problem. No shift until 3500 out of first or second. After that it runs great. Doesn't matter if the vehicle is stone cold or after 100 miles of driving 75. I have no clue what it could be, the dealership looks at me like they are second graders doing astrophysics. I am at a loss, I guess my next step is to take it to a tranny shop. I am sick of messing with it.
  • 2001 Jeep GC, 133K miles. Daughter driving it, stopped at a red light, put into park. Tried to put back in drive, would not go past neutral. Put it back into park and turned it off. Would not start after that. Acted like it was not into park/gear (not even trying to turn over). Tranny shop say it needs ripped apart and rebuilt ($1800-2400 guesstimate). Anybody had similar issues? Thoughts comments welcome. Thanks!
  • You may also want to check the Throttle Position Sensor. Not only does the tranny computer take inputs from the speed sensor and pressure sensor, but also from the throttle position sensor. If it thinks you're pushing the pedal down more than you are it will wait before shifting down so as to give you more power.

    When you switched out the pressure sensor did you also switch out the solenoid governor? They are on the same body. The solenoid is one of the the outputs from the tranny computer and puts its signals into action.
  • 2001 Jeep GC, 133K miles. Daughter driving it, stopped at a red light, put into park. Tried to put back in drive, would not go past neutral. Put it back into park and turned it off. Would not start after that. Acted like it was not into park/gear (not even trying to turn over). Tranny shop say it needs ripped apart and rebuilt ($1800-2400 guesstimate). Anybody had similar issues? Thoughts comments welcome. Thanks!
  • Hey buddy, sorry replying so late just seen the post. I had an 05 jeep limited hemi as well, with the same bang noise when i would shift from nuetral to reverse or drive. I was told all types of nonsense like replacing sensors and even transmission rebuild. Thankfully i went to an experienced mechanic and turns out it was a simple BUSHING that was worn out. It was located towards the front left of the bottom of the car. Tell this to a trust worthy mechanic and he will find it. Good luck
  • :confuse: :mad: I seem to have the same problem or at least similar. When I am in what would be 1st gear and under 15-20 miles per hour, my tranny grabs likes it's trying to slip or something. I've had it into the Jeep shop several times and they say they can't find anything wrong. They performed an update on it that they thought would help and all it did was lower my fuel mileage. I'm not sure what to do at this point and I don't know where to turn for answers. I'm sure they think because I'm a girl, I have no idea what I'm talking about and I'm simply wasting their time. I'm no mechanic, but I know when a car shouldn't do what it's doing! I'm not crazy...... Am I???

    HELP!!!!!!! I love my car, but when it does this "regularly", I'm afraid one day I'll be sitting along side the road with a blown tranny.
  • rwengrrwengr Posts: 177
    edited January 2012
    Because repairs at the dealer are so expensive I have lost touch with that environment. They did not find a problem with the transmission because there probably isn't any. The transmission must interract with other engine controls. My guess is that one of these controls is off and is affecting the transmission. My Jeep is a 97 which was before they began using a computer in the transmission so I can't be specific.

    If I was in your situation I would not go to the dealer any more. Retain the documentation of your previous visits. Do not go to a transmission shop right away. Find a good general mechanic. Look for a private shop. Take your car and ask them to make sure something else is not causing the problem. Ask them to make sure transmission cooler lines are not leaking 1 drop of oil. They should be bone dry.

    If they say it is the transmission, ask them to refer a transmission shop. If not, do their repair.

    If the transmission shop has to fix it, take their bill to the dealer and ask them to refund the amount to you under warranty.

    Your problem could be something as simple as a loose ground wire or an electrical connector that has become contaminated with grease or oil.

    Please be aware that you risk hitting another snag trying to follow my advice. It all depends on who you are dealing with.

    A 2011 Jeep transmission should be flawless.

    Do not take it to transmission shop right away. They may find a non-transmission problem, but ask you to do an expensive rebuild anyway.
    First, make sure something outside the transmission is causing a problem with the transmission.
  • boydscoveboydscove Posts: 1
    edited January 2012
    Hi, I don't know if anyone has had this happen before so here goes. I own a 2002 Jeep Grand Cherokee Laredo with 176,000 kms. Lost the reverse and just before that when you stopped at an intersection and than tried to accelerate, the tranmission was not dropping back into first and is trying to start off in third gear. Took the vehicle to a transmission shop, had the reverse replaced and than he took a look at the shifting problem. Governor sensor was replaced twice, wiring harness has been replaced. They said it was the computer, took the vehicle to the dealer and had another computer programed and put into it. Codes still show that the governor sensor is the problem. Advised to return vehicle back to transmission shop to be fixed. Still have the same problem. Is there anything else that can be done?
  • 76577657 Posts: 1
    my 2005 jgc with 80K miles makes a thumping noise when automatically switching between gears. once up and running at 60 mph on the freeway with no gear changes runs fine.
  • jclerkjclerk Posts: 2
    Have 2002 jgc, 4.7L, in the last year or so, when engine starts up cold, it revs high, 2 to 3 grand, up and down, and slowly drops rpm down;
    if put into drive when engine revving high, then engine stalls;
    if let engine idle and warm up; then engine still revs around 1 to 2 grand at idle; but car can be driven without stall;

    cleaned control valve body, no difference;
    took it to a mechanic, he checked with his alldata, says, the throttle control valve is bad; quoted $150 for part and labor;
    after new throttle control valve, no difference;

    mechanics says, the tps, throttle position sensor, is also bad, another $150;
    now engine runs and idles smooth as silk; idling under one grand, no more high revving after start up, and no more stalling when put into gear;
  • Hi my 2004 Grand Cherokee Jeep has an intermittent fault, every week or so the Transmission sticks in first gear. I have to stop and then the fault is fine. It happens maybe twice in a journey, but only happens every 4 or 5th journey. I have had the fluid and filter change. it has 70k on the clock. Any advice.
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