P1740 code
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P1740 code
So just bought a 2001 dodge ram and im getting this code and i need to get it through emmisions. the truck seems to run fantastic but from what i have read its eitehr to tcc solenoid or the overdrive solonoid. Im wanting to assume its the overdrive solenoid because when i change between o/d i dont notice any sort of change. any ideas on how to at least get it throw emmisions without putting a whole lot of money into it or diy on how to replace the solenoids? i have to say its my first truck and i have never changed solenoids so this is a little new to me. even with all that i do have to say i love my dodge. its way to much fun to drive.
Champion
Joined: Sep 2011
Posts: 3,891
Likes: 8
From: NorCal
So you're saying the CEL is on during the smog inspection and they won't pass you? Usually on a sale, the seller is responsible for performing the smog test and responsible for corrections (at least by CA law here) before Buyer gets it.
I don't know what that code is referring to and I'm not going to look it up.
What is the actual description of it then....? If it's either of those solenoid's then that will cost ya on the tranny.
Good idea to search the forums for related topics or google in general too.
I don't know what that code is referring to and I'm not going to look it up.
What is the actual description of it then....? If it's either of those solenoid's then that will cost ya on the tranny.
Good idea to search the forums for related topics or google in general too.
tranny isnt part of emissions though? i'm confused on how this would prevent you from passing
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
Torque Converter
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
Torque Converter
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Registered User
Joined: Mar 2013
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i dont understand why its cause me to fail either. personally i think its ridiculous. The transmission seems to be fine. It just doesnt seem like my overdrive is working. Would the light stay off if everytime i turned the truck on i just turned the o/d off. I just need it to stay off long enough to get through emissions. last time it came on after 30 miles. Im thinking about replaceing the valve body i just dont really know how. its in the transmission pan right. Im hoping that would clear the code. if my idea as to trick it doesnt work.
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
Download the 01 service manual from the FAQ/DIY section. You need to replace the TCC/OD solenoid assembly. Replacing the valve body will not fix it. While the pan is off replace the gov. solenoid with a borg warner solenoid, and install a drain plug too.
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
It's sorta behind the valve body. It is possible to replace without VB removal, I have done it and so have others, like redneckram for instance.
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Legend
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From: Austin, TX