Question about 1990 Mitsubishi Montero

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Overdrive will not engage

My transmission will not shift into 4th gear. I have been having this problem 4 some time now. The transmission fluid level is fine and there are no apparent problems with the other gears. I am trying 2 locate the overdrive relay so I can test it to determine if it is working properly, but having no luck. Any help with diagnosing this problem would be much appreciated.

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  • Anonymous Jan 22, 2009

    Where is the speed sensor located? Now I am pretty sure it has to be the solenoid. It is making a sort of whining noise from under the Montero when I get up to around 40-50 mph

  • yadayada
    yadayada May 11, 2010

    the vehicle speed sensor may be the problem, check it . All overdrive functions are controlled by the computer and the shift solenoid inside the transmission, no relay

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Check the OD solenoid on top of the tranny (drverside) apply 12V + to it and take for a test run if she works then you know the problem may be the OD relay, temp switch or its wiring. I had just simply rewired a new OD switch.

Please let me know if this help.

Thanks,
Tom

Posted on Jun 30, 2010

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I have a 1990 montero it has 478,000 miles and still runing strong!

Posted on Feb 20, 2012

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1 Answer

Overdrive will not engage.


Does the car have a button on the shifter handle somewhere to disable overdrive? Also, there is a plug on the transmission that must be plugged in to engage overdrive so check to make sure it is plugged in correctly.

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99 ford contour with flashing OD light and transmission shifts narly, also sounds like its stuck in 3rd gear and refuses to shift into 4th


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My 2001 jeep grand cherokee wont shift into 4th it only goes to third what would cause the 4th gear to not engage


There are several things that could cause that.
> Replacement transmission not equipped with overdrive
> Overdrive solenoid in replacement transmission defective
> Overdrive control circuits damaged or loose pins or connections.
> Gear shift linkage or cable out of adjustment
> Transmission range sensor malfunction or out of adjustment

Since you have a computer-controlled transmission, it would be better to ask the onboard computer that question....you will probably get a much more definitive answer.

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1994 shift only when overdrive is off.


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Does the overdrive only engage 4th gear? or does it feel like the gear ratios are different between overdrive and normal before the problem happened? some overdrive buttons engage final gear and some do as much as change gear ratios like in a cvt (contantly variable transmission) and some just change the timing in the gear changes to provide more rpm/power.
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there is a total of 27 diagnostic steps to follow, but here is some info for you:
SYMPTOM
P1740-TCC O/D SOL PERFORMANCE

WHEN MONITORED
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the PCM requests TCC engagement in 3rd gear and O/D.

SET CONDITION
The code will set if the expected RPM drop is not achieved while attempting to engage TCC or O/D. This indicates a malfunctioning torque convertor or overdrive clutch.

POSSIBLE CAUSES
- Camshaft DTC present
- Engine RPM DTC present
- Fuel level low
- Misfire DTC present
- Output speed DTC present
- P1765 DTC present
- Park/Neutral DTC present
- PTO engaged (if equipped)
- Torque converter clutch DTC present
- TPS DTC present
- Transfer case in low range (if equipped)
- Transmission Relay DTC present
- Transmission temperature too cold
- Intermittent
- Check transmission fluid-debris
- Check transmission fluid-stall
- 3-4 Shift Solenoid
- Oil Pan contains excessive debris
- Shaft or seal damage
- TCC solenoid
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1 Answer

I have a 2000 dodge durango with a trouble code p1740 what does it mean


SYMPTOM
P1740-TCC O/D SOL PERFORMANCE

WHEN MONITORED
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the PCM requests TCC engagement in 3rd gear and O/D.

SET CONDITION
The code will set if the expected RPM drop is not achieved while attempting to engage TCC or O/D. This indicates a malfunctioning torque convertor or overdrive clutch.

POSSIBLE CAUSES


Camshaft DTC Present
Engine RPM DTC present
Fuel level low
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Output speed DTC present
P1765 DTC present
Park/neutral DTC present
PTO engaged (if equipped)
Torque converter clutch DTC present
TPS DTC present
Transfer case in low range (if equipped)
Transmission relay DTC present
Transmission temperature too cold
Intermittent
Check transmission fluid-debris
Check transmission fluid-stall
3-4 shift solenoid
Oil pan contains excessive debris
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1 Answer

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2 Answers

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