2004 Rubicon in limp mode with P0700, P0605, and P0706 codes (TCM replacement did not resolve issue)

[Dustbug86]

At a loss here. I have an ‘04 Rubi auto. My jeep went in to limp mode while driving with no prior transmission symptoms and will not shift beyond 2nd gear. Checked fluid levels and reset battery. Codes were p0700 and p0605. I bought a replacement TCM from Wranglerfix after talking to Mark who felt that was the issue. It did not fix the problem. Still waiting on callback from their tech for 2 days now; not sure if replacement TCM is defective or not.

Reset codes and checked again which now show: p0700, p0605, and p0706 (TRS/NSS). No crank issues otherwise. It cranks in P and N, and does not crank in gears it shouldn’t. didn’t see any obvious issues with melted/frayed wiring; haven’t started ohming out wires or verifying grounds/power circuits. I’d rather have a starting point before going down that rabbit hole, so any help would be appreciated. Also will happily delegate to any recommended mechanics in northwest AR who aren’t con-artists and/or incompetent.

 

[Don Bulee]

I suffered the same a few months ago, I bought a wranglerfix PCM didnt work, new solenoid pack didn't work... at the end it was some wiring being damaged and pressed against itself, the electrician guy didn't notice because the continuity test passed, since they were making a short but they had continuity.. look for the wiring routing, the harnesses and if not, maybe consider changing the solenoid pack... (did that too, didn't solve it because as I mentioned, it was only wiring issue)

 

[John Cooper]

Check your tranmission harness really close. I found a wire on the passenger side above the sensor. The loom had crumbled and let the harness rub on the sensor.

It took me a while to find it. Once I found and repaired it, and put new loom on it, I haven't had any problems.

Take your time and feel each wire.