QuestionQUESTION: Dear Kevin!
Thank you for attention!
I have same problem like there: http://en.allexperts.com/q/Chrysler-Repair-807/94-LHS-transmission-limp.htm
But I have rebuild transmition, changed solenoid block and most replaceable parts, continiuty of all wires from TCM to Solenoids are OK. What should I do next? I have New-Yorker 1994
ANSWER: Hi Vadim,
Because you are having shifting problems, and I presume as well that it only runs in 2nd gear sometimes, that has to mean that the transmission computer has recognized the problem and stored a 2-digit/4-digit code number in its memory that says what is the problem.
You need to use a Chrysler diagnostic readout box II (DRB II) or equivalent OBD-I code reader to get the code, if this is a '95 or earlier model. The port to plug into has 6 pins, is blue, and located under the dash to the right of the steering column. The code reader should seek for the transmission codes (not the engine codes). Find the code and tell me the number. If it is a '96 or '97 then you need an OBD-II reader (Chrysler DRB III) and the plug is also under the dash but has 16 pins. The code number will be 4-digit.
There is no other way to diagnose this problem efficiently without a code number. So get that and then we can go from there.
Roland
Vadim wrote at 2010-04-20 19:26:46
Thank you Roland!
I have forgotten!!! Code is 41 LR solenoid... It happens time after time... At the morning cold car (AT) works very good!!!
Moreover AT goes to limp mode after 10-15 min from start these days and after 20-25 minutes in the winter time i.e. after warm up may be. But not always.
Some days it is OK.. some days I have to stop and "reload" TCM 2-3 times a day. Warm car/AT (after 20min or longer) can go to limp mode since I shift to DRIVE... after that i stop, turn ignition off, wait for a 5 seconds, start again and go OK.
Hi Vadim,
That code means the transmission controller has noticed that the low/solenoid is not responding electrically as it should to being tested. It may be a simple wiring problem between the TCM and the solenoid box on the outside of the transmission. The wire is light blue in color and connects pin 6 of the box to pin 20 to the TCM plug. You could check that wire for continuity while gently shaking the harness.
If that proves out, then you would suspect the solenoid itself, inside the solenoid pack. Most of the time the entire pack is replaced rather that attempting to replace a single solenoid. You can change the back itself by removing the box cover, and then there are three vertical bolts on the back of the pack which when removed will allow you to take the pack off the transmission, after removing its electrical plug.
That is how to approach this, I believe.
Roland
PS Please 'rate' my answer, and where you see the question about 'volunteer of the month' please consider giving a 'yes' answer. Thank you.
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QUESTION: As you can see in my first post I have checked continiuty of all 8 wires from TCM to AT by mulimeter! I have replaced solenoid pack twice!!! NO CHANGES...I have repaired my AT. ( repaired torque converter, hydraulic unit, solenoid's block, friction discs and many that loked wear). Now: Cold car works wery good! But after warming sometimes AT goes to limp mode. If I stop, turn off ignition, wait 2-5 seconds, run motor an go again AT works good. Sometimes AT can jump to limp again, and third time... but often it work OK. twice AT jumped to " N "-mode or like N mode. I mean when I drive down the hill without acseleration and than acselerate tachimeter's arrow runs like on ''N" anc car not respond to the pedal... than bump and I am in limp... If I stop and live warm car for short time and run again to drive AT can jump to limp mode since start. Can be reason of my problems that not learned my TCM?
ANSWER: Hi Vadim,
The list of specific possible causes for the 41 code includes everything that you have tried to eliminate as a cause (wiring, connectors, solenoid pack). The last possibility onthe list is that the TCM is bad. I doubt it has to do with 'learning' of the TCM because the learn procedure has to do with the specific characteristics of the clutches, rather than whether the solenoids work or not. With all that you have done, and still have the problem, I believe that the TCM itself is the problem. If you can find a used TCM that comes from an identical vehicle, that is what I would suggest you do next.
Roland
PS Thank you for rating my earlier answer.
---------- FOLLOW-UP ----------
QUESTION: Yes I found TCM and nothing happens!!! Still goes to limp when hot!
I added ( by solder ) additional wires from negative to TCM ground, from positive to solenoid pack connector on the right side, from pin 20 of TCM to solenoid pack connector on the right side, added parallel relay to EATX relay by solder, excluding fuse and relay connector in PDC, wire from positive to this relay... Solenoid pack was changed twice... O-o-o-o!!! Any ideas? Thank you!
AnswerHi Vadim,
How about the possibility that the trans fluid cooling lines, cooler core, or fins of the radiator/tran cooler are partially blocked which would cause the transmission to run too hot? Maybe if you can cool the fluid more effectively the symptom will disappear?
Roland
PS: Two last ideas: when it fails check to see if you have power to the trans relay from fuse B in the box under the hood (20 amp). It might have a subtle crack in its wire that 'opens' when the fuse heats up.
Have you contemplated running with the relay jumped and see if anything mis-behaves? It is a risk, but might result in a code of some relevance being set.
