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Jeep Grand Cherokee Transmission Problems



  • Thanks for the help, I'll let you know how I make out. I'm going to replace the gasket this weekend. I still haven't been able to find out how much transmission fluid I need. Will the autoparts store know that or do you know where I can find it?

    Any other thoughts on why I might be leaking fluid?

    I spent a good 45 min. looking around. The entire bottom of the transmission pan was wet as well as the gasket all the way around but nothing above the gasket had fluid on it. The only other spot was the plate that covers a wire connection on the corner of that pan was covered.
  • nnealnneal Posts: 72
    Not sure about the auto parts store knowing as they vary widely. Still, it doesn't hurt to ask. Sometimes one of their more experienced employees might know where to find it, especially if they want to sell you tranny fluid. They might even have one of the lower cost service manuals. I don't know how much the newer vehicle owners manuals have been dumbed down, but the earlier ones used to show fluid/oil capacities in the back. First thing would be to find and make sure of the model transmission you have. Then, you could ask the dealer service department (good luck), and if that falls through, Google the transmission model number for any info you can find on the web. Many times I've seen transmission manuals listed. In the end, what's going to matter is what's shown on the dipstick, so getting more than you need is not a problem.

    Myself, If I feel I'm going to keep a vehicle for a fair amount of time, I always invest in the factory service manual. No, they're not cheap, but you can rely on them for accurate information. In my view, they pay for themselves.

    As for the leak, is it possible to be coming from above, only to be blown on the pan by airflow? Only other "common" source of a leak I can think of would be cooling lines. Another possibility is the fluid could be from something else other than transmission fluid. Transmission pans usually don't contain a fluid level higher that the top of the pan (gasket area). If the gasket has an open spot, it's probably the fluid sloshing around and spilling out. Clean the pan best you can, then observe it after driving a little. Good luck.
  • I have the Ground diagram and alot of things are tied together like the power windows, they are on the same ground as the VSS, but I didn't see the TPS in this. I checked the ground associated with this components, and they are like new. So I pulled the cover off of the harness from the sensors on the Intake to the PCM. By the head they or soaked in oil, and the rest look good, my next step is to trece wires and check the splices. Any other suggestions.
  • Auto parts stores have the capacities and the fluid that vehicle needs every time I ask. I would check all the cooler lines first that easier that dropping the pan. If they are not wet though they probely are not leaking. Also is the connection on the pan or the case of the transmission, make sure that don't leak. Good luck!
  • nnealnneal Posts: 72
    Just curious, if you unplug the TPS, does it affect the engine at all? I'm wondering if it's still "in the loop", or if the PCM is in default mode somehow. Another thought, if you don't see a ground wire/strap from the engine to the frame/body, why not ground them together to see what happens? I'm probably repeating what you've already tried, but can't think of anything more at this time than what you're already doing. Keep plugging away!
  • Yes when you unplug it it idles high, and the throttle response is slow. Also the guy I got the ground diagram off of said that PCM's have bolts going through the fire wall and that's how they ground. You think I should run a wire from the head over to the fire wall. I'll try that maybe there's a ground I missed and is corroded.
  • nnealnneal Posts: 72
    Yeah, I think that'd be a good idea just to rule it out, even if you don't leave it that way.
  • loosenutloosenut Posts: 165
    lately,with all the hi milage junk i can afford to drive,ive come acrost-"prestone trans stop leak"..used it in my jeep,where i found a trans funnel under th hood-like it was used quart,and havent had to add any more for over nearing two years now..
    -found the prestone stop leak with a old ford aerostar,with a worn out steering rack-a common problem-, used a quart in two months-mostly winter,and after two bottles,it still doesn't use any more !..
    --lots of folks harsh all that goop,but i'd sooner pay 5 bucks for a stop leak-usually name brand name,then have to rebuild the seals in a tranz..ya just gotta try,and see what works! :sick:
  • I found a ground on the diagram that's on the coil bracket. I took the stud and nut out and they were rusted up, and the threads were corroded, along with the connectors on the grounds. I replaced everything but nothing changed. I pulled the head off last night, i'm getting everything checked and the oil leak fixed this time, the oil killed one starter and I cleaned the other and got it to work. Maybe the tranny will shift right when I put it back together.
  • Ok well I parked my jeep friday afternoon and on sunday when I went to change the gasket I expected to see a huge puddle as I have the last several mornings but there wan only a small one.
    I started it and put it in drive for a minunte and after that it started leaking pretty good ( a drop every 10 seconds or so)
    Went ahead and changed the gasket but it keeps leaking in the same spot, at the gasket in the corner by the electrical connection. There were no burrs or dents and I cleaned both faces well.
    When I called the dealership and told them my problem right away he asked if it was by the electrical connection but then wouldn't tell me anymore and said I'd have to bring it in.

    Any thoughts???

    This is a lease and I only have it for two more months and really dont want to take it somewhere and pay acouple hundred dollars to get it fixed.

    Thanks for all the help
  • Is the connection wet and if it is see if it's loose or you can take it off. There is probely a gasket on the connector. When it's running look at the connector and see if it's running out around it.Good luck!
  • nnealnneal Posts: 72
    While you didn't mention what transmission your Jeep has, I did find this note on a pan gasket leak from the electrical connector for a 2005 Jeep at link title.
  • I feel like a dummy now. After an hour or so of research on the computer yesterday I found a service bulliten about the o-rings on the electrical connector!

    I crawled back under the car and sure enough that was where the leak was actually coming from. It was almost impossible the see up there so I never noticed it.

    You have to buy a whole new connector bushing not just the o-rings but it was only $18 and bout half an hour of work to switch it out. I wish I found this earlier and saved myself and you al ot of trouble.

    Thanks again
  • rwengrrwengr Posts: 177
    Some things to think about I have learned. Some I read. Some are my own. You may have already done some and maybe none of them apply.

    1. Clean metal surface with lacquer thinner (test on painted surfaces first)
    2. Thoroughly clean threads of fasteners with solvent then wire brush. Clean holes throroughly.
    3. High quality Felpro gasket
    4. Judicious use of RTV sealant and let it cure 24 hours. Follow instructions provided with sealant. Do everything the sealant instructions recommend..
    5. If a bolt hole may have access to fluid chamber, try thread sealant on the bolt
    6. If gasket is moving around as you install it, try gasket adhesive to hold it in place
    7. If bolt hole is leaking get a thin rubber washer and coat it with RTV (believe it or not I found some washers at Lowe's)
    8. Over torque the problem bolt or nearby bolts 10-20% and use thread lock. They make different strenghts. Do not use the strongest or you may have trouble getting it off.

    Depending on your situation, some of the above may involve risk, but you are at a point where std procedure is is not successful.
  • nnealnneal Posts: 72
    No trouble at all. That's what we're here for. Usually all we need is a nudge or reminder to jog our minds.

    I'm surprised the dealership wasn't more helpful to you. That's another reason these forums are so handy. I can't count the number of times they've helped me out.
  • I have a 2007 grand Cherokee V8 2 x 4. I am having an issue with the transmission, after the car has sat for a long time overnight and I started to place it in reverse the transmission slips and it takes a while for it to synchronize. I had service today at a authorized Jeep dealer and he said they could find nothing in that all I'd need to do is sat and let it warm up a minute before a court in reverse. Doesn't sound right to me sounds like there has to be some problem either with a pressure valve or draining the fluid within the transmission that is causing this slippage when the vehicle is cold once it has been driven it does not react this way until it sits all afternoon are overnight. you may have on what might be causing this as the Jeep dealer said they could find nothing wrong.
  • tuggajbtuggajb Posts: 646
    on my jeep i start the engine then hook my seat belt then put it in gear when cold took care of my isue now have 212000 miles with no trans problums
  • nnealnneal Posts: 72
    What model is your transmission? Is your "check engine" light you have any trouble codes?
  • loosenutloosenut Posts: 165
    -sounds like a common problem with a lot of auto transmissions-not just jeeps,,
    --when i sold used cars,they called it "morning sickness",as it usually only happened when you'r trying to go ta work..more often than not,the trans filter is starting to plug up..when the fluid's cold-it's thicker,and harder to pass through a gummed up filter..
    --my sugestion?have it "power-flushed"whitch changes ALL th fluid-even what's in th torque converter(that doesn't happen when you pull the pan,and change th filter)..
    --backflushing also cleans th filter..for the 125 my local aamco quoted me,with syntetic-didn't sound TOO bad..ya change the oil regular,but expect trans fluid to last as long as th car?..kinda goes for th rest of th lubricants -down to th axle grease..
    --when owning a car,you can make payments,or make repairs,but usually when the payments stop they "planned obsolesence" parts like duel pumps,water pumps,etc-in a attempt to get you-the consumer-out from under th hood-and into th showroom..

    --while taking my just recently aquired-98 laredowith a noisy rear axle,had a salesman tell me"you need a new jeep",and got kinda pissy when i came back with -"i don't need a new jeep-as bad as you need to sell one !"
    just another way to milk every nickel they can outta you..,and those salesmen will never know the satisfaction of making a broken thing work again-just because of YOUR talents..i get a lot of satisfaction from that..i can't always fix it all,but i still have some talents.. :shades:
  • steverstever Posts: 52,572
    I've been scared off from power flushing; seems to be too many failures associated with power flushing (especially from external machines).

    Hard to say whether the tranny was going to give up the ghost anyway, but why stir up all the gunk? I don't even trust the flush where you let your engine do the pumping. Please let us know how it goes, Cecarter3, if you go this route.

    amigo_john, "Isuzu Trooper" #8070, 30 Jun 2003 6:46 am
  • All,
    I have read of this problem in other posts but did not see any threads with the answer, I am hoping someone knows what the malfunction and fix maybe. I bought my wife a 2007 Jeep Grand Cherokee Laredo 4x4 in 11/08, the vehicle had 27,000 mile on it and was still under warranty, now prior to going out of warranty about 8 months later she was driving her vehicle to work when she said the "Check Engine" symbol lit up plus some other dash symbols the engine was still running but she was getting no power to the transmission she pulled the vehicle to the side of the road, shut the engine off waited a few seconds - started the engine and everything was back to normal. When she came home that night and told me of the incident I checked the vehicle out and also took it to the local Dodge Boys to have them run a diagnostic - according to the shop there were no problems. Now the vehicle is out of warranty and this same issue has happened to my wife several times and I could not get the vehicle to repeat this issue nor could the local Dodge Boys. I had read some posts that there could be programming issues with the TCM or PCM and to disconnect the battery for 5 minutes and let the system reboot - I did this and had no issues for about another 6 months - in the past month this has happened to my wife twice and the other day it finally happened to me - luckily I was less than 100 feet away from Auto Zone and was able to have them run a diagnostic which came up as U0404 and said something about bad data from the transmission. If anyone can be of assistance please let me know unfortunately like a lot of Americans I find myself economically in a bad situation and cannot afford to trade this vehicle in.
  • I have had some problems with the check engine light. Thanks I will check that out. :)
  • That could be a sensor on the tranny that's not giving the right signal, or like you said about the TCM it might not be reading the data right.

    You should see if you can have a mechanic hook a snap-on scanner to it, like my brother's, because it does a troubleshooter on that code and give you some ideas on where to start. You could also check the sensors connections if they are corroded or damaged, but I would look into the troubleshooter first it helps alot.
  • rwengrrwengr Posts: 177
    I have serviced my own trans fluid several times. I concur with cecarter3. He's right. You need to do a flush if you want to completely swap out the fluid.

    Ask if there's suppose to be a magnet in the bottom of the pan and if not, is it OK to add one. It collects any small metal particles that are created. I've seen magnets with a lot of grit on them.

    If you have to prioritze your budget, get the trans filter swapped out first.

    The dealer will be your most expensive choice, but they will actually do the work. Anybody else, ask for the old filter and when you go home, verify it came from your car.

    If that doesn't fix your problem, I suspect that the transmission and engine are not interacting properly when the engine is cold.
  • I have a 2001 Jeep Grand Cherokee 4.0L, 2x4. The transmission has been slipping. The code came up 0740 pointing to the torque converter. I replaced the Pressure transducer, Pressure solenoid in the governor, fluid, new filter and I drove it for a few days. The slipping seemed to be gone. Then the transmission icon on the dash came on. This was the first time it came on, with the prior slipping it did not. The same code 0740 came up again (AutoZone).
    I drove the vehicle on the freeway for about 35 minutes. At my next stop, I had no reverse and there was smoke coming out of the transmission stick tube. Since that time I have continued to drive it to work about 10 minutes away. I never go over 35 mph. I hear this rubbing, whining sound about seven minutes into the drive.
    Now here’s the kicker. Yesterday, reverse started working again. if the torque is damaged, should reverse gear be going in and out? and if it is NOT damaged, what sensors or valves or electrical parts need to be replaced? Or is it now time to drop the dreaded transmission? Sorry for so much detail. Thank you in advance.
  • A damaged torque converter shouldn't affect reverse but the whole tranny. I would think If the torque converter was damaged that it wouldn't move. On my jeep there is something I think is a sensor, i'll look, it's on the bellhousing. I'm not sure if a vavle engages reverse or a solenoid, my guess would be a solenoid to engage reverse, but i'm not sure i'll see what I find. Also is the tranny getting really hot maybe it's not getting fuild at the right spot, if that's the case something could be burning up. Have you had it to any transmission specilists yet, that would help. And what model is it that will tell you a lot.
  • rwengrrwengr Posts: 177
    I serviced my 97 jeep transmission last summer and I swear I had enough fluid in it, but my mechanic said it was low. Added fluid and problems went away.

    It would be interesting to know how the transmission cooler is suppose to work and if it is OK. Is it under pressure like your cooling system and how can you measure it?

    As a precaution you might want to verify that the filter is keyed by shape or bolt pattern. There's not enough space here for all my mistakes.
  • Does anyone know why code 26, Governor Pressure Sensor Offset Drift, for the tranny would be coming up?
  • 2000 Jeep Grand Cherokee 4x4 6 cyl. When I make a left turn, the transmission seems to slip for a few seconds then catches and goes into gear. Only happens on left turns. Took to transmission place and they found nothing. Transmission levels are fine
  • I think that could be somthing to do with the rear differention slipping in the turn when all the weight is on the right, because that makes no sense why the tranny would only slip on left turns. It's a thougt!
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