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| Degrading shift. http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=79766 |
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| Author: | cman [ Sun Aug 03, 2014 12:06 am ] |
| Post subject: | Degrading shift. |
I have an 05 Liberty with 200,000 miles. Started rough shift between 3-4. Shifting was fine after quick learn for several hundred miles. Had transmission rebuilt and problem did not go away. Once in a while P0234 error would trip when the engine is cold. I cleaned the MAF and replaced the boost pressure sensor. Have not had P0234 since. Shifting still degrades after a quick learn. Transmission shop has no idea and the dealer is guessing. Any ideas? |
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| Author: | flash7210 [ Sun Aug 03, 2014 9:25 am ] |
| Post subject: | Re: Degrading shift. |
At what speed is this rough shift happening? Many here have posted about a rough 2-3 shift at about 20 mph. As far as I know, no one has found a solution to that problem. Most shift problems are related to either low fluid, bad filters, worn out transmission pump, or solenoid pack. Could also be a clogged transmission cooler. |
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| Author: | cman [ Sun Aug 03, 2014 1:54 pm ] |
| Post subject: | Re: Degrading shift. |
Most of what you mention was replaced or repaired with tran rebuild less than a month ago. The roughest shift is 3-4 around 40mph, depending on throtle position. 1-2 and 2-3 are rough but not as bad. After quick learn shifts are smooth for several hundred miles. I'll check tran cooler - the only thing on your list that has not been fixed. |
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| Author: | lars0247 [ Sun Aug 03, 2014 2:05 pm ] |
| Post subject: | Re: Degrading shift. |
I had the rough shifting problem too. There was a post a few months where someone said clean the pins on the TCM and connector (viewtopic.php?f=5&t=79424). I did this, and I used to have the rough shifting come back invariably after about 200 miles (I used to relearn it once a week). Now, since cleaning the pins, I have driven for over a month and the shifting has only gotten better. No binds, no bangs, nothing harsh. |
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