2004 Rubicon 42RLE stuck in second gear

[inlovewithrubi]

I am at my wits end !! The details 04 tj rubicon 4.0 42rle. Got into my jeep one morning and it was stuck in second gear. Replaced solinoid pack, filter , new fluid. Still stuck in second gear. Brand new aftermarket transmission, and new TCU. Still stuck in second gear. All connections correct no visible damage to wiring. I am lost, and don't know where to turn next.
Last thing found before I had to go to sleep for work. Electronics connection on drivers side was not secure. Also found that O/D override switch was not working.

 

[Capt Keith]

What codes are you getting on your Check Engine Light if any? Just thinking out loud, but could it be bad wiring on the transmission speed sensors?

 

[Jerry Bransford]

Two different transmissions stuck in 2nd gear? Does it shift OK between the other gears include 1-2 and back?

 

[inlovewithrubi]

Hey Jerry, no the transmission will not shift through the gears manually either.
OBD2 scanner coming today. been wanting one for a while anyway.

 

[72afr]

May be unrelated and too simple, but have you checked the internal shaft on the shifter? Mine snapped once when trying to reverse into a spot. These have been known to break. Just pull the handle off and see if the plastic is free floating (it shouldn't be).

 

[inlovewithrubi]

Correct, I am aware of this happening, but my jeep is stuck in LIMP mode/ second gear.
The shifter in the cab will cycle through all the gears, but trans will not go into first.
I do currently have my locker pumps out while I clean them up and make provisions for a new location.

 

[williambmac]

The first thing i would be checking is your B+ and ground circuit for the tcu.
Check that you have power across fuse 5 in the underhood fuse box. This provides B+ to the transmission control relay in the fuse box and the tcu.
No power means a dead tcu and trans being stuck in limp mode.

(1) STICKY - Jeep Wrangler TJ Factory Service Manuals (FSM) & Technical Documentation | Jeep Wrangler TJ Forum

Go to the wiring section of the your service manual, section 8w-31-3

 

[albshri]

i have the exact same problem its been like 8 month since it begins and i really dunno what to do i did exactly the same as you did but its useless so if anyone knows how to solve this please tell me

 

[Jerry Bransford]

i have the exact same problem its been like 8 month since it begins and i really dunno what to do i did exactly the same as you did but its useless so if anyone knows how to solve this please tell me

What diagnostic trouble code is it generating?

 

[AndyG]

@Wranglerfix may be of help.

 

[Wranglerfix]

@inlovewithrubi @albshri What codes are you getting?

 

[albshri]

many cods...p0700.....u0101.....p1604......p0622.....p0038......p0058.

 

[albshri]

i'm really tired of trying solving this problem i did everything i know like gear cooler changing vlave body and Replaced solinoid, filter , new fluid nothing worked its been like 8 mouth or more i did read about this problem and now i know that its called limp mode or something...
btw the car is shifting good when its cold but when its a lil worm this limp mode thing happen so like when i turn the car on its shifting for like 20-30 min then this happen.
if anyone knows anything please help !

 

[Wranglerfix]

@albshri what year is your Jeep?

 

[albshri]

its an 06..
what is this web(Wranglerfix) and who should i talk to ?

 

[Jerry Bransford]

its an 06..
what is this web(Wranglerfix) and who should i talk to ?

That it's an 06 is good news, @Wranglerfix likely has a fix for it which is a swap of your PCM (engine computer). 05/06 PCMs had a lot of software bugs that affected the transmission. www.wranglerfix.com and ask for Mark.

 

[Wranglerfix]

@albshri I am mark with Wranglerfix. The codes you are getting for your 06 are pcm failure without question!

Can you take a picture of the authorized software update number on the pcm please?

 

[albshri]

i will tomorrow my car is not here now...
but i did change the pcm it was good for like a day and thats it

 

[Wranglerfix]

We use a different pcm that is modified to work in the 05-06 TJ’s. The oem unit is not repairable. Send me the photo tomorrow and I will verify the software needed for yours.

Thanks,

Mark

 

[albshri]

what is oem ? and what if the pcm didnt fix this problem ?