Transmission problem - Jeep Cherokee

Transmission problem - Jeep Cherokee

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Max

United States

#1 Apr 14, 2007
1999 Jeep Cherokee Classic, 6 Cyl. 4.0L
Automatic transmission. 103.000 Miles.

Hi, I am not good with autom. transmssion, I can really use some help on this one...
I bought this Jeep used 3 months ago with 100k on it; I have put 3.000 miles on it then the transmission started acting up:
When motor is cold, regardless of warm/cold weather, it is really hard to get it to shift from 1st into 2nd; it revs up as if it was in neutral and I have to play with accelerator pedal to get it to shift. When motor temperature reaches about 140/150 degrees shifting gets a lot smoother. At 200/210 degrees temperature the problem disappears completely. Any ideas? I thought it may me a faulty throttle position sensor or pressure governor, but wouldn't that be faulty all the time regardless of motor temperature? Trans. fluid looks and smells old, probably still original. Should I flush? Should I just drain and refill or should i also replace pan-gasket?
Should I also change the filter? I hear that if the filter has been sitting there for a long time it is not advicebale to replace it as it sort of bonds to the tranny in a way that once removed it may not allow the replacement filter to sit properly. Is this true?
Should I add Lucas or Pro-long or some other trannie treatment?

Please help me with any ideas, I have had really bad experiences with my local transmission shops.

THANKS!!!

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Andrew S

Vancouver, WA

#2 Jul 16, 2007
Hey max, I have a 89 jeep cherokee laredo auto. 249,000k. I was having the same problem with my tranny. I looked everywhere online to find the problem, only to find that I didn't need anything new at all!(besides some new transmission fluid)
With a 1" wrench I disconnected the "speed-sensor" (which on 89's I'm told is the first year that they had them) I pulled out the cable and all I saw was a little square rod coming out of the end of the cable. It wouldn't move...?... I moved it in and out quickly so that is broke free of all dirt that was lodged inside of the cable. sprayed some degreaser, put it back! It shifts great!! I guess that as the fluid got hotter, it would melt the rest of the dirt so that rod could move freely..? I didn't change my tranny fluid yet, but the thought of dirt inside it...

Hope this helps. I know mine is a lot older, but I'm told is a common problem with all jeeps. Fixed my mom's manual 93 wrangler too! Same "speed-sensor".

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Kelvin

Orlando, FL

#3 Jul 21, 2007
Hey Max, I have a 98 with 125k on it and I would recomend that you give that tranny a complete service. Start by removing all the old fluid and filter then flush the tranny without the filter in it, drain the flush and let it sit for a few minutes so all the old stuff can drain out. Put in the new filter and some MOPAR ATF +4. This stuff is great, you can get it at any dealer, it's more expesive but if you want that tranny to last for ever, use it!! hope this helps, kelvin
steve

Boca Raton, FL

#4 Feb 2, 2008
My 1999 is doing the same as max's.Where is the speed sensor at?Also is there a problem with the throttle positioning system? Steve
Chief of the Cherokee

Saint Louis, MO

#5 Feb 12, 2008
I have a 1990 Cherokee Laredo 4.0 (AW4 tranny) that sometimes downshifts while driving. It seems to happen when there is no load on it-- when I let off gas while going downhill to maintain the same speed. On the highway, tranny downshifts into either 2nd or 3rd (I'm pretty sure it's not slipping). I have already had fluid flushed and filled, but it still happens. Any help with the problem is greatly appreciated!!!
Chief of the Cherokee

Saint Louis, MO

#6 Feb 13, 2008
Also, when I am going through a parking lot, it will sometimes abruptly shift back and forth between what seems to be 1st and 2nd, as if it is confused. I have to play with the peddle (like give it more gas, then let off to coast at that speed) to cruise at a comfortable parking lot speed. Any ideas to fix it???
tuggy

AOL

#7 Feb 14, 2008
I just scored an 89 cherokee,auto trans,178000 miles,a coupla weeks ago and it ran fine.Lately though I,ve been starting to notice,when I jump on the freeway, that it seems to get stuck in 2nd gear,between 2000-2500 rpm's.My speed,on level road,is about 55-65 rpm's.Temp gauge normal at 12 o'clock.Oil pressure gauge is at 10 o'clock.I also seem to lose a little power going up an incline,sometimes I have to floor it.Is my tranny going out,or am I having sensor trouble?Maybe I have a bad plug or something?
Thomcycle

Irving, TX

#8 Feb 25, 2008
I have a little different problem that everyone seems to have; mine doesn't seem to start out in first gear most of the time. If I put it into drive it seems to be starting from 3rd gear. If I start out in L1 it seems to start out in 2nd gear and I manually shift into drive (3rd gear). At the same time this started happening I was losing fluid but no leaks. Is there some sort of vacuum operated switch that might be cracked??

HELP
sal

United States

#10 Mar 27, 2008
I seem to have the same problem as Max but my jeep is a 2003, also a 6cl with about 73000mi. I have change the tranny oil and filter... and thers been no change still the same problem... looks like next step is to take Andrews tip and disconnect the speed sensor hope this helps...PS is there a recall on this problem ?
keith_JaxFl

United States

#11 Sep 14, 2008
I have a 2002 Jeep Grand Cherokee Limited. After I drive and the Jeep heats up, the overdrive turns itself off and then the light "trans over temp" comes on the dash. Any suggestions would be appreciated.
Brooke

Suncook, NH

#12 Oct 30, 2008
So my 1998 Cherokee that I just bought had a check engine light come on when it started to kick at me, acting as if it wouldn't get the gas and or shifting into neutral while driving, like the first post ^^^. The reply to the first post seems like it fits, the mechanic that I bought it off of is going to fix it tomorrow and assumes it is this as well, but today it started to leak tranmission fluid too! So now I'm not sure if it's the leak or dirty cable or what... any one else have comments?
Julie

United States

#13 Nov 6, 2008
I had my tranmission rebuilt on my 02 jeep cherokee sport-got it back and the overdrive light comes on and the tranmission light also comes on. now i am out of $1600.00 what is the deal here besides me throwing away money?
Jerry

Las Vegas, NV

#14 Nov 11, 2008
I have a 2004 Cherokee Laredo with 55,000 mis. When driving, there is a whining sound coming from beneath, sounds similar to a high pitched turbine. In neutral, it cannot be heard either at idle or when revving. My son described it as sounding like a remote control car is racing beneath the Jeep.

Sound like anything you're familiar with?

Thank you very much for your help
Bill

Reading, PA

#15 Dec 4, 2008
I just had the same problem with mine today. Anybody tell me what fixed theirs. I doubt it's just time for a trans service.
keith_JaxFl wrote:
I have a 2002 Jeep Grand Cherokee Limited. After I drive and the Jeep heats up, the overdrive turns itself off and then the light "trans over temp" comes on the dash. Any suggestions would be appreciated.
Mary

AOL

#16 Jan 9, 2009
My 2002 Jeep Cherokee with only 70,000 miles - transmission just died. The only sign I could see would've been a high pitched noise when in reverse backing out of driveway first thing in morning - other than that - nothing! CHECK YOUR TRANSMISSION! Also, Chrysler isn't going to do a darn thing about it! I bought this thing - paid it off - thought it would be good for a long time
(did ALL maintainance as required at Dealership)
It's a JEEP - supposed to be built strong.
And our government give them a bailout - all this time selling substandard vehicles and crying they still don't have money! I am so mad - no money to fix right now - where's my bailout! Over $30,000 and only lasts 70,000 miles - c'mon
alr

Spring Valley, NY

#17 Feb 15, 2009
Thomcycle wrote:
I have a little different problem that everyone seems to have; mine doesn't seem to start out in first gear most of the time. If I put it into drive it seems to be starting from 3rd gear. If I start out in L1 it seems to start out in 2nd gear and I manually shift into drive (3rd gear). At the same time this started happening I was losing fluid but no leaks. Is there some sort of vacuum operated switch that might be cracked??
HELP
me too

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ricky

Oviedo, FL

#18 Feb 16, 2009
i have a 98' Jeep Cherokee Laredo with about 163k on it and i have the same problem with my jeep about it leaking auto tranny fluid and i just opened the oil reservoir and replaced the gasket with a new one and replaced the oil with new oil and it worked like it rolled off the showroom floor but i still hear and there have a acceleration problem in 1st and 2nd gear until i get to about 30-35 mph so i'm going to try that speed sensor thing to see if it works, thanks for your advice guys!
Steven

Knoxville, TN

#19 Feb 23, 2009
Yo, I was thinking about buying a Jeep Cherokee Laredo with 108K on it but after visiting this page and listening to all of this, for one, I am sorry that you have all gone through these problems but two, I guess doing your homework really works, I'm not buying it now. Thanx guys, you are great
Felix

Framingham, MA

#20 Feb 26, 2009
I have a 1999 Grand Cherokee with 165k miles on it; a couple of weeks ago I started hearing a squeaky whistling noise while driving, and stops when the car is on idle (it gets louder the longer I drive). It radiates all under the car, making it impossible to pinpoint. Someone told me my tranny is about to go out. The fluid is clean and I changed the filter late 07.

Any ideas on what this problem might really be?
Hoofer

North York, Canada

#21 Mar 7, 2009
I have 3 cherokees and all have almost 300,000 on them and I haven't had any problems with the tranny's. I was a little worried when I got the first one, cause I heard they had tranny problems. It was so good that I bought another one for parts. I ended up driving both and picking up another one just in case!!!

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