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I just ordered one of these and can't wait to install it. Perfect timing that this is the first post I saw this morning. I've been dealing with the PCM problem the last few weeks. It's summer here in New Mexico and I'm ready for top off Jeep driving without the weird hard shifts and...

I have been dealing with the Jeep TJ PCM problem causing hard shifts from 1st to 2nd gear, 4.0 motor and 42rle auto trans. I have reset the PCM by battery disconnect. This stops the hard shifts for a while, but it comes back. I have seen in other posts that people have replaced the PCM to...

I like the negative with the headlight plan. Never thought I would see the day that rebooting my Jeep would help fix something. Makes me miss my old Army Jeeps.

Thanks. This is helpful. I won't bother with turning the OD off driving around town, and if I need to do the computer reboot once in a while a few minutes sound good. What about what I read that says to disconnect the positive battery terminal and ground it for 10 minutes, then hook it back...

I have been dealing with trans issues myself and during my research I found some prior posts about the temp sensor. I remember a post that had your issue and he checked a transmission temp sensor ground that is connected at the rear of the Cylinder head. He checked the cable at that point and...

This is why I asked. Disconnecting the battery for 8 hours did correct the problem, at least for now. I guess now I will see if this fix works long term or just for a while. it's been 5 days. I heard other made it for a week and the problem came back, then a few others went for months and...

My 2006 TJ with 4.0, 42rle and 3.73 axles had the hard shift problem after I went to 16" moab wheels and 31" tires. I made sure the trans fluid was good and full checking with motor running in neutral. Then I disconnected the battery for 8 hours to reboot the computer. Now it works great, no...

Interesting idea. I think if I ever find one again I'll get a good old military M-38 or Willy's CJ with the old T-90 trans and no Computer. Ofcourse I won't go more than 45 miles an hour.

My 2006 TJ with the 4.0 motor, 42rle trans and 3.73 gears was having hard shifts only when I first drove it. Then it would calm down and shift smoothly. I checked and made sure the trans fluid was full, clear and pink with no burn smell. Still did the hard shift in the morning. Then I found...

The Wheels and Tires are sold.

I had the scan done and it showed no codes. I read about the PCM problems on some model in 2005-2006 and I do have a 2006. Just odd that I never noticed this shifting thing until the last few times I drove it. Could putting taller wheels and tires effect the shifting? I'm not liking this...

I have not scanned for codes, but I will do that. Didn't think I needed to as I had no check engine light.

As I posted the other day, I have noticed that the TJ's first shift of the day is very noticeable. It has been this way since I changed from 15" wheels rims with 30" tall 10.5" wide tires to the 16" moab wheels with 31" tires. I started turning off the Overdrive first thing. Before I forget I...

I still have these wheels and tires available. Prefer someone to pick them up but if you arrange shipping that is ok too.

I added some ATF 4 and checked with the engine running. Now the shifts already feel smooth. Maybe I found the issue. Thanks to all. This site is very helpful.

I just checked the trans fluid level with the engine running in park and found it is a bit low, The fluid comes up top the second hole on the dip stick from the top. The area marked hot is not showing fluid. Is it possible I should add fluid first, since the fluid look very clear and pink, no...

I have 117,000 miles on mine and I am the second owner. I like your advise on this. I think I will go the Jiffy Lube route first. My trans actually works very well and this is the only time I've evn noticed a gear change. Thanks.

I have a 2006 I think an X. It has the 4.0 Engine, 42rle Trans and 3.73 axles. I just noticed the last two times I drove the Jeep the first transmission shift was very noticeable. Before the trans shifting has always been very smooth. It only did this the last two times I drove it, and only...

The TJ Doors are sold. Thanks everyone.

I will leave how to get these shipped to the buyer. Better for someone close to pick them up.