Last post on Dec 06, 2013 at 12:29 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee, SUV
#822 of 1101 no overdrive in my transmission
May 25, 2011 (7:07 am)
I have a 1995 Jeep Grand Cherokee with 220,000 miles. I had the transmission rebuilt 1 1/2 years ago. Now the light on the dash to turn the overdrive off for towing mode is staying on all the time. It has no pick up and go it just is slow starting to accelerate. Once driving things are fine just dont pull out into busy traffic from a dead stop unless you have the room. I tried disconnecting wire connectors on the trans to see if one of them would make the light go out and none did. I read that since this is a 1995 to read the transmission codes your supposed to watch this light blink after turning the key for codes but since mine stays on it doesnt even blink. I have not found anyone familiar with this problem. I am plenty capable of doing the repair if I was to know what to repair and where to look. Someone told me might be a speed sensor but where is it? Which senor is it? Is it inside or outside the transmission? Any help would be appreciated.
#823 of 1101 Re: no overdrive in my transmission [uncfuz]
May 25, 2011 (2:58 pm)
I'm assuming your transmission is a 42RE. An article describing that model is at: link title. Google "42RE manual" to find manuals online. I found one at: link title. Hope this helps. Please let us know your progress.
#825 of 1101 Re: no overdrive in my transmission [uncfuz]
May 31, 2011 (8:13 am)
I had a problem with backup light switch. The problem was that the switch was not getting 12V. You need to check +12 at switch or wire into trans if switch is internal. You also need to check the Ground wire. If +12 at the switch is not OK ou need a wiring diagram so you can trace it. In my case I traced it all the way back to the fuse box. +12 was OK on wire coming out of fuse box. I saw no obvious break in wire, but am unable to inpect it everywhere. I hooked up another wire, pressing a thin connector end into the fuse box along with the fuse. Then, I cut wire 1/2 way between trans and fuse box. Then I spliced in the new +12V. If you have this problem and splice does not give you +12 at the switch, it means wire problem is further downstream. I spliced mine at the firewall and it was ok. GND wire is easier to fix. You just need good connection to the chassis.
If your +12 wire has rubbed bare and is shorting to ground, the fuse should be blow.
Note: Electical switches are either active high (+12) or active low (GND). When you cut a wire you are making it float. Depending on circuit, it will float high, low or in between. My guess is most auto circuits will not have a pullup or pulldown resistor due to cost so it will go in between. If cutting a wire fixes it, it just means you were really lucky.
#826 of 1101 2003 Jeep Grand Cherokee - won't shift into reverse
Jun 08, 2011 (6:52 pm)
Have a 2003 JGC Laredo 4x4 inline 6 with 107,500 miles. Haven't had any major mechanical problems with it and have owned it for two years. Just within the last couple of months it has been making almost a grinding sound when shifting into reverse in the morning after sitting at night and shaking. It will stop and run fine if I put it into another gear then back in reverse. Well tonight it decided that it doesn't want to go back into reverse anymore. It's never slipped gear so we don't think the whole transmission is going out, and all of the 4x4 gears work fine - except for reverse. It doesn't make the usual regular shifting noise when you put it into gear for reverse, and when you rev it sounds and feels like you're just in neutral....could it be a vacuum or sensor issue with the reverse gear? We don't have any $$ to take it to a mechanic... All help would be TREMENDOUSLY appreciated! Oh - and the tranny fluid was just about bone dry so we refilled it with a couple of quarts and still nothing.
#827 of 1101 Re: no overdrive in my transmission [uncfuz]
Jun 20, 2011 (12:03 pm)
Hi, I have the exact same vehicle, with the with the exact same symptoms
and exact same problem. The overdrive light is on all the time and it takes off
in high when in drive. . This means that line pressure from the pump
is reaching the High or direct clutch and the intermediate band, applying both
and putting the transmission in high gear before you even take off.
I did the same as you did and disconnected all the electrical wires on
the transmission, transfer case and overdrive. Light stays on and still takes
off in high gear. So I am thinking that the trouble is inside the transmission.
My guess: governor solenoid always open, or valve body problem
Hope somebody somewhere has the answer. Cheers Gerry
#828 of 1101 94 Jeep Cherokee 4x4
Jun 29, 2011 (12:13 am)
About a month ago I purchased a 94 Jeep Cherokee 4x4 country edition. A few days later I started having some issues. After the jeep is warmed up and I turn it off. If I restart the jeep while It's still warm and put it in reverse it'll die almost always. Sometimes takes a dozen times before it will stay running. Also, lately when I'm driving down the road if I hit a bump or sometimes just go up a hill the jeep will feel like its jerking back. I took it to a mechanic and he promised me it was the idle air control. So he replaced it and I picked it up a few days after he had it and 300 dollars later. And same problem later that day after I picked it up. I took it back to the mechanic and now he says I need the transmission rebuilt and the transmission is causing both above problems. This jeep has 134,000 miles and is the 4.0 inline 6. The jeep doesnt rev up between gears or anything. Has anyone else had this problem?? I also thought it could have been the crank shaft position sensor but the mechanic swears it isn't but would be happy to change that part for another 200 dollars if I'd like. What should I do? I'm pretty sure this mechanic sucks and I'm going for a 2nd opinion but just seeing if anyone else has had this possible "transmission" issue.
#829 of 1101 Transmission Problem:Grand cherokee laredo
Jul 05, 2011 (12:47 pm)
I just bought a Cherokee for cheap with a trans problem. I have not really gotten into it yet but meanings how this is my first jeep i wanted to ask some advice. During acceleration it does not want to upshift. You press the accelerator down a little ways and you go just fine but when you would think the trans would shift the rpms just climb. you can trick it into shifting when you play with the rpms. get it above 3k and take your foot from the accelerator until the rpms drop blow 1.5k and then put your foot back into it. other than that i am happy with it so far. Any ideas what it might be?
#830 of 1101 Re: Transmission Problem:Grand cherokee laredo [saigam709]
Jul 05, 2011 (12:51 pm)
i've already changed some filters and plugs but still there is problem..do i need to get the new transmission plates?
#831 of 1101 Re: Transmission Problem:Grand cherokee laredo [saigam709]
Jul 05, 2011 (1:16 pm)
You don't say what year your jeep is or what model.
The mid '90s Grand Cherokee can get shifting problems related to the governor solenoid and input sensor. (Also the TPS-Throttle Position Sensor).
Here is an article about the solenoid on the 4.0L mid '90s Grand Cherokee.