Good morning/afternoon fellow Jeepers,


I got a 2000 Cherokee Classic 4x4 at about 300k on the clock and recently had some weird issues with a recurring p0715. I have been in these forums searching for about a year learning and searching many resources you were all so kind to post.


Here is a small condensed list of things I have looked into based on my searches and diagnosis:


- Verified trans fluid level at operating temp in neutral on level ground

- Tested TPS per testing guidelines (5v ref, ground, singal, using analog meter to see the voltage changes) everything within spec and tried a spare I had MOPAR OEM

- Cleaned and tested all grounds on chasis/engine bay with <= 0.02 ohms at each point

- Cleaned NSS, verified 12V signal thru TCM plug in each gear. Verified continuity on the pins in the engine bay harness. Starts in P and N and reverse lights work

- Changed out the transmission input and output speed sensor OEM MOPAR and tested for 500-700 ohms, checked out. Also, measured AC voltage to verify pulse generation gear 1-3. No AC voltage signal present in 4th gear on the input side?

- Had a spare TCM from a 1999 and still triggers code

- Tested the wires from the input speed sensor to the TCM and to the PCM. No shorts to ground or short to voltage according to the test procedure in alldata

- Replaced all shift solenoids because the old ones had some high resistance values on the 2nd

- New Dex 3 fluid poor man flush 3 times and new filter. No metals found in the pan

- Checked CCD Bus +/- signals through TCM connector and dash cluster and they check out

- Checked the brake switch at the pedal for proper adjustments and voltage and it checks out no TCC lock/unlock problems

- Replaced my CPS because it was old and was being wonky with OEM sensor MOPAR

- Forgot to mention I have adjusted the kick down cable using the procedures from the manual I found online


I think that was everything. Sorry for the super list. Anyway, I am trying to see if I missed anything or if anyone has experience with this issue. The car doesn't go into limp mode at all and still shifts which is super strange. When I shift to 3rd and leave it there the MIL does not come on and when I drive over 20 mph in D the MIL does not come on. Only at low speeds there seems to be an issue and I get the P0715.


Any information to point me in the right direction is appreciated and thank you all!


-Eric

 

Bump

 

Rebuilt everything inside the slushbox. When working in the valve body, 3-4 shift valve cap was broken and spring was not in spec. It was binding during the down shift on OD back into 3rd. Next time, start with the easy stuff first saves you a lot of time. Lol