Last post on Dec 06, 2013 at 12:29 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
What is this discussion about?
Jeep Grand Cherokee, SUV
#1080 of 1101 Re: 2001 Laredo Drops out of gear when warmed up [krystynaca13]
Aug 13, 2013 (6:44 am)
By the way...there are no leaks of any kind and fluid levels are correct...
#1081 of 1101 Re: Grand Cherokee transmission problem FIX THAT WORKS! [krystynaca13]
Aug 13, 2013 (7:18 am)
Regarding your question regarding if we have fixed our transmission limp mode problem, the answers is yes, but... The fix only lasted 3 months. However, we repeated the battery disconnect, reconnect process and the MPH limit and it is working again.
Here's what we did: We replaced the TCM and the Jeep dealership found the PCM was also malfunctioning (it was turning off the TCM). So, we replaced the TCM, too and cleaned all of the connectors with canned air. (We bought our PCM and TCM remanufactured online for great price.) Then, we removed first the negative and then the positive battery connectors, (the order of removal is very important) then we let the car sit overnight. In the morning we replaced the battery cables, negative first, then positive. You should see that your engine light is no longer on. These fixes alone do not completely fix the problem. You MUST drive the first 50 miles after the fix at no more than 50 MPH, not 51 MPH or 52 MPH, no more than 50 MPH. We stayed around 46 MPH as we have slightly larger tires than stock and we did not adjust our speedometer for the MPH change.
This may seem like a lot of hassle. But, now if the transmission drops back into limp mode we simply have to redo the battery cable steps and the first 50 miles at no more than 50 MPH. We suspect the TCM and
PCM connectors may also need to be replaced but, we don't want to tackle that right now.
This fix is the result of a lot of research and a helpful mechanic at a Jeep dealership. But it really works and it's cheap.
Let me know how it works for you.
#1082 of 1101 Re: Grand Cherokee transmission problem [krystynaca13]
Aug 13, 2013 (8:11 am)
So finally got it fixed, was a train wreck where one thing triggered another. Turns out the o2 sensors (2 of the 4) went out. ($50 each to replace) which messed up the computer, ($150). And also the transmission needed replacing ($2,400). But now runs perfects. U can check from cheap to expensive and see if one or all of those issues are effecting yours.
#1083 of 1101 2003 grand cherokee stuck in 1st
Aug 18, 2013 (8:47 am)
abs & engine management lights on & wont come out of 1st gear can you help
#1084 of 1101 2003 grand cherokee stuck in 1st
Aug 18, 2013 (9:07 am)
We have found that nearly every one of the problems found in our 2000 Jeep Grand Cherokee were computer related. Replacing both our TCM and ECM got rid of a myriad of weird computer codes and malfunctions including our transmission being stuck in park, stuck in 1st and dropping into limp mode (second gear only).
We purchased remanufactured ECM and TCM units online that were programmed specifically for our 2000 Jeep Grand Cherokee by using our VIN. They were pretty easy to install. If you search on-line there are plenty of videos showing exactly how to replace them and then plug them in. Our units cost $125, plus tax and shipping each. A whole lot cheaper than going to a dealership. Our local Jeep dealer was going to charge $600 for just a PCM and $600 to install it.
Note: It is a very good idea to keep you speed under 50 mph for the first 50 miles after installing a PCM , TCM or both. We have found that this helps to prevent phantom check engine codes from returning. Really, keep it under 50 MPH. We kept our under 46 MPH as we have a little larger tires that than stock. Now, no more check engine lights.
#1085 of 1101 Re: 2001 jeep grand cherokee shift problem [manderz]
Aug 28, 2013 (8:54 am)
Same thing happened to me... It was my crank sensor. Only 40 buck at auto zone.. Looks like a phone cord. I have a 2001 jeep grand cheroke laredo 6 cyl... Mine would shut off on me in the middle of driving. Then maybe 20 mins later would start right back up.
#1086 of 1101 Re: 2014 8 speed tranny [cpc1]
Sep 20, 2013 (7:13 am)
I have a '14, wish I had gotten a Ford Explorer or a Toyota. The 8 speed transmission in the V8 is apparently problem free. The 8 speed trans in the V6 is the roughest transmission I have ever had in a vehicle. They keep putting out software updates and none of them fix it. If I had to purchase again I can guarantee I would not get a 14 JGC
Sep 24, 2013 (5:30 am)
Hello, I have a 2012 JGC with 19k miles and when it shifts into overdrive it shifts very hard almost like a bang into overdrive. It doesn't do it everytime or under certain conditions, it is intermittent. The kind of problem you hate to go to service with like my 2011 JGC I traded in for this one because of the shuttering problem they couldn't fix and they said there was nothing wrong with it.
Sep 27, 2013 (8:05 pm)
I have 09 JGC 4x4 3.5L. I am having the accelation problems that a lot of post talk about. Every so often my Jeep won't go beyond 20mph. I have tried the stop and restate method only to have it start again. Then other days there is no problem at all. So I thought that I might be low on fluid and accidentally over filled it. What can I do to narrow down the field of fixes. I just cannot afford to change out things hoping that it might work. Several post talk about TCM and others talk about a throttle position sensor. Will code reader help?
#1089 of 1101 Re: So confused [hjacoby]
Sep 27, 2013 (8:33 pm)
We have two Jeep Grand Cherokees and we have found that whenever you have an intermittent Jeep problem it always, always, can be traced back to one of the computer control modules. On-line you should be able to locate diagrams of where your ECM and TCM modules are located in your engine compartment, then do the following:
1.) Disconnect the battery: negative and then positive terminal.
2.) For both the ECM and TCM units unplug the main cable and take a few hairs of a new paint brush and clean out the holes.
3.) Let the car sit disconnected overnight to reset the computers.
4.) Reconnect the ECM and TCM cables in the morning.
5.) Reconnect the battery: positive and then negative terminals.
6.) Important when you start using the car again, for the first 50 miles you MUST not drive a single MPH over 50 MPH. If you have bigger tires than the factory tires, stay under 44 MPH. This is a hassle but it is part of the process of fixing the problem. Which will return if you don't exactly follow all of the above steps exactly steps.
Once you are done check to see if you have any engine codes by turning your key to the on position without starting the car 3X in a row. The 3rd time don't turn off key and you see either numbers flashing, one or more, or the word done. Done is what you are hoping for. If not than go online and check the codes.
As a last resort you can replace both the ECM and TCM for around $125 each they're sold on the internet. They must be programmed to your VIN#. There pretty easy to replace. I went to a dealer the first time and they wanted to charge me $600.00 per unit and $400.00 to install each one.
Best of luck. Please post if this fixed your problem, or not.