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Tcm issue On transmission not shifting pass low gear

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  • Brock Saint Aoro
    Brock Saint Aoro Dec 11, 2014

    Hi Luis Alonso, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?
    Year Make model and is there aanything that was done to the vehicle lately.

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  • Contributor
  • 15 Answers

Model? Year? Make? Need more info and put a scan tool on it for codes.

Posted on Dec 12, 2014

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2006 chrysler 300 transmission slips

Low on transmission fluid. The tranny fluid can only be checked by Chrysler, there is no dip stick, because you have to know the motor temp to be able to know where the fluid should register on the dip stick. Crazy!
Its not slipping now, but shifts hard. Has to be looked at by Chrysler again, but its done this since Ive had it, so I didnt realize it was a problem....

Posted on Oct 12, 2008

  • 1114 Answers

SOURCE: 2002 Ford F150 5.4L hard shifting

Have you ever changed the transmission fluid flush and replaced the transmission filter?

Posted on Jan 11, 2009

  • 43 Answers

SOURCE: transmission does not shift out of 1st gear

There is a vacuum line that is connected to a vacuum modulator on the transmission. The vacuum modulator looks like a tiny inline fuel filter on the right rear of the transmission. Remove the vacuum line from the modulator, if transmission fluid spills out when the rubber hose is removed the modulator is punctured. The engine will **** your transmission fluid through the vacuum line and into the intake system and burn it through combustion. If the modulator is punctured you must have it replaced.

Posted on Nov 29, 2009

  • 613 Answers

SOURCE: 2002 dodge neon transmission will not shift out of

check your transmission solenoids see if one went bad also check your vehicle speed sensor if its messed up sending wrong signals

Posted on Sep 25, 2010

  • 432 Answers

SOURCE: 2001 dodge stratus wont shift

Good Evening, I have a dumb question. have you cleared any current or history codes in the transmission? They will default with codes in the system. Also make note on what they are. If any and we can go from there, and yes tcm would be the next place to go but more info is best as far as codes and such.

Posted on Oct 28, 2010

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I have had a machine put on my Citroen C4 grand Picasso and it's come up with error codes P0925 & P0919 saying gear shift error, does this mean I need a new gear box?


code p 0919 refers to gear shift position control===causes wiring--- poor connections ---ECM---TCM
code p 0925 refers to gear shift reverse actuator --circuit /range performance ===causes --wiring---poor connection---gear shift reverse actuator---ECM---TCM
code p 1351 refers to IDM input circuit malfunction---ignition coil control , high voltage
there is nothing there to indicate a new transmission is required as the TCM ( transmission control module ) and reverse actuator or normally add on units and are separate to the box main
the wiring is always suspect as it hardens and breaks or the connections get corroded and do not pass power properly
I would at this stage not consider a new transmission and if it is suggested , I would get a second opinion from an accredit auto transmission specialist shop with experience on your vehicle

Oct 05, 2016 | Citroen Cars & Trucks

1 Answer

How i fix the p0730 and p0735 in range rover 2006


Possible causes of OBD code P0730
- Low transmission fluid level - Dirty transmission fluid - Shift solenoids - Shift solenoids harness or connectors - Transmission mechanical problems - Transmission hydraulic control circuit The Error code is generally activated on detection of the following conditions: The TCM has detected that the transmission is trying to mechanically shift to a lower gear than intended

Possible causes of OBD code P0735
- Low transmission fluid level - Dirty transmission fluid - Shift solenoids - Transmission mechanical problems - Transmission hydraulic control circuit The Error code is generally activated on detection of the following conditions: P0735 is detected when A/T cannot be shifted to the 5th gear position even if electrical circuit is good.

Dec 24, 2014 | 2006 Land Rover Range Rover

1 Answer

2005 jeep grand cherokee laredo transmission shifting problems


  • A/T or M/T (auto or stick, gee)
  • if A/T is this the 42RE box>? are you in DRIVE? or 1 or 2 gear.
  • does rpm rise above 3000 rpm > at your attempt? if not ,its a bad engine (weak)
  • is the shift linkage even shifting correctly (movement top and bottom)
  • check levels yet. (and for pink ./red AFT not black-metal flake
  • change the filter yet? or skip service. at 50k miles. ?????
  • check all fuses yet>?
  • using a basic OBD2 scan tool are there any tranny DTC errors?>
  • does the FSM stall test pass? in 1st.? and reverse?
  • if stall fails, slips , then tranny bad. if not its really stuck in 1st gear.
The TCM commads the gear change, there is no valve body brain.
the TCM shifts to second with good inputs to the TCM
if the TCM sees bad inputs it will tell you, SCAN IT.

Sep 14, 2014 | 2005 Jeep Grand Cherokee

1 Answer

Loss of power, transmission issues


code p0700 refers to transmission control system/MIL --malfunction===causes --wiring ---TCM (1)
code po740 refers to torque converter clutch (TCC) solenoid--circuit malfunction===causes--wiring--TCC solenoid--ECM/TCM (transmission control module) (again)
code p0871 refers to transmission fluid pressure (TFP) sensor C -range/ performance problem==causes---wiring--poor connection--TFP sensor--ECM /TCM (yet again)
code p0734 refers to gear 3 ratio (po374 is gear ratio 4) incorrect ratio===causes --wiring--TR sensor/switch--shift solenoids--transmission mechanical fault (causes are the same for po733&734)
code po846 refers to transmission fluid pressure (TFP) sensor B-range/ performance problem===causes ---wiring--poor connection--TFP sensor--ECM/TCM (again). Give the clutch a miss as you still have 1st gear and if the clutch is not working you will not be going any where. Have a pressure test done on the transmission to check for internal mechanical failures (pump ). The rest are sensors are wiring connections , sensor and TCM. My bet is the TCM unit. Have it checked out. What ever you do treat any suggestion of a new transmission with a grain of salt until you are shown proof positive that you need one.

Nov 15, 2013 | 2003 Dodge Neon

1 Answer

I have a suzuki jimny 2002 and get check engine light on and code P1600 an P0763 and when the switch is on i hear the relay on the TCM. can you suggest?


P0763 - Shift Solenoid C Electrical
Possible causes- Faulty shift solenoid C valve
- Shift solenoid C valve harness or connectors
- Shift solenoid C valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission fluid
When is the code detected?The P0763 code is detected when the gear required by the ECM does not match the actual gear when vehicle is driven.Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission will not shift gears.P0763 Description Shift solenoid valve C is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.

P1600 - Loss of KAM (Keep Alive ECM memory) Power; Open Circuit

Check all fuses related to the ECM

Jun 22, 2012 | Suzuki Jimny Cars & Trucks

2 Answers

Code p0734 I just replaced eng. and trans. now have this code.


Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit Tech notes Start by inspecting the transmission fluid level and condition, and change fluid if necessary. When is the code detected? P0734 is detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good. P0734 NISSAN Description This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Aug 09, 2011 | 1995 Nissan Altima

1 Answer

Transmission slow shifting in first gear shifts hard if forced


sounds like you have a tcm issue...you should 1st have the tcm adaptation codes removed to see if that will rectify the issue...if not it may have to be replaced

Aug 04, 2011 | Jaguar XJ8 Cars & Trucks

1 Answer

My came with a code po734 is that a big problem?


DTC P0734 - Improper Ratio for Fourth Gear.
P0734 is detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Tech notes: Start by inspecting the transmission fluid level and condition, and change fluid if necessary.


Test and check it and send us ypur comments.

May 14, 2011 | 2000 Land Rover Discovery

1 Answer

When i turn key on to start park and D4 lights up. The transmission trys to go into gear! then while driving the trans is stuck in low gear.


These lights where turned on by the Transmission Control Module (TCM) to alert you to the fact a fault has occurred in the transmissions electronic shift controls, it can also indicate a mechanical fault. It sounds like you may have a electric shift solenoid problem. To confirm what the problem is that turned on the lights you must have the TCM scanned with a special system scan tool, it will pull fault codes from the TCM's memory.

Apr 27, 2011 | 1992 Honda Accord

2 Answers

Ford trauras trouble code 732 - was told transmission code 732 was being produced, what does a code 732 say?


P0732 FORD - Incorrect Second Gear Ratio
Transmission in second gear and the ECM detected an incorrect gear ration. This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Tech notes
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.


Hope helps.

Apr 26, 2011 | Ford Taurus X Cars & Trucks

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