Question about 1999 Dodge Ram

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99 ram diesel 4wd the problem is that under light throtle conditions at 42 mph the torque converter locks into overdrive like it's suposed to but unlocks all by itself and it keeps doing this untill either it hits 50mph or you sink your foot into it a little more...... anyone had anything like that happen?

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  • bobzworld33 May 09, 2009

    converter tested ok at local dealer and the trans is is controled by the pcm witch has also tested fine.The only thing that i coould think of is the tps is acting up/

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Just had the same problem,truck did it 4 years ago and it was the map sensor,so i installed a new map sensor this time and it didnt work.removed both positive battery post for one hour and it that worked great. tim

Posted on May 11, 2009

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Sounds like you may have a leak in the torque converter or the TCM (Transmission control module) is not working correctly.

Posted on May 09, 2009

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The tranny wont shift up in drive from third at about 40 mph the tranny starts to hesitate stutter. already changed oil filter and speed solonoid


just by your description (detailed) id say it could go a few directions ??4 a cause, one way is the 40 mph is near the speed that overdrive is engaged (42 mph) these do sometimes have problems inside them (gears ) also the stutter you mention is sort of an indication that your torque converter didn't lock up or is locking/.unlocking this is an indication of a immanent torque converter failure , if car was made past 2001 then chances are good it has some kind of transmission control system that could log a fault to help you look for a cause like a faulty speed sensor or something , ck your codes !!

Apr 12, 2016 | Cars & Trucks

1 Answer

My 2007 dodge with 5.9 diesel is showing engine malfunction light and error code of P1740, failed TCC or overdrive solenoid. The truck seems to run ok in overdrive but I don't understand what the TCC...


Code P1740-Torque converter clutch did not lock up when the PCM sent the command. Enabling conditions: No engine or transmissions codes are present, vehicle speed was under 70 MPH, TPS was under 33% open. When the PCM commanded the torque converter to lock, no change was detected in engine speed. Blocking action: This code can block the following monitors: none.

Testing: Check torque converter solenoid for proper operation.

NUMBER: 21-11-00
GROUP: Transmissions
EFFECTIVE DATE: October 02, 2000
SUBJECT: 46RE Transmission MIL Due To DTC P1740 - TCC or OD Solenoid Performance
OVERVIEW: This bulletin involves the replacement of the transmission pressure boost valve cover plate.
MODELS: 2000 - 2001 (AB) Ram Van 2000 - 2001 (AN) Dakota 2000 - 2001 (BR/BE) Ram Truck 2000 - 2001 (DN) Durango

NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 46RE TRANSMISSION BUILT BEFORE AUGUST 01, 2000 (MDH O8O1XX).

SYMPTOM/CONDITION:
The customer may complain of a Malfunction Indicator Lamp (MIL) illumination. Upon further analysis, it is determined that the MIL is caused by Diagnostic Trouble Code (DTC) P1740 - Torque Converter Clutch (TCC) or overdrive solenoid Performance. Other than the MIL, the customer may not notice any other condition with the transmission.

This condition may be caused by an intermittent and momentary TCC disengagement condition. The transmission valve body pressure boost valve cover plate has been revised with a larger size orifice hole to address this condition.

NOTE: THE DRB III(R) MUST BE OPERATING AT RELEASE LEVEL 50.4 MDS2 SYSTEM CIS CD2067 OR HIGHER (AVAILABLE THE WEEK OF OCTOBER 2, 2000) IN ORDER TO PERFORM THE REVISED TORQUE CONVERTER CLUTCH STALL TEST. DO NOT USE EARLIER VERSION STALL TEST TO DETERMINE CONDITION OF THE TORQUE CONVERTER CLUTCH.

Here can find the test in pdf format: 2009-11-28_034958_1124.pdf

Hope helps.

Apr 28, 2011 | Dodge Ram 3500 Cars & Trucks

1 Answer

In overdrive it feels like my torque converter isnt locking in. Any suggestions? It is an 02 silverado and normal rpm at 70 mph is 2000 and now its running at 2300


It is possible your lock up torque convertor has a bad connection or wire.
You should be getting a check engine light on in your dash.
You will need a OBD II reader plugged in to retrieve code.
Please let me know.

Feb 09, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

2000dodge ram 5.9 4wd torque converter locks in and out at 53 mph


53 is pretty much normal,60 being max. when the converter locks your gas milage goes up. Don't knock it!

Jun 22, 2009 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

TPS..?OR WHAT


I HAD A FRIEND AT OUR LOCAL DEALER TELL ME TO DISCONNECT THE NEGATIVE CABLES FOR ONE HOUR AND THEN RUN IT. SO FAR SO GOOD......NO PROBLEMS YET THANKS!!!!

May 12, 2009 | 1999 Dodge Ram

1 Answer

Torque converter


I had the same problem .dodge service told me to check the ground wire.i bought another wire at wally world and installed it from battery to body. no more problems for at lest 3000 miles

May 09, 2009 | 1999 Dodge Ram

1 Answer

Error codes


Her is the definition and a list of possiable causes.


Code P1740-Torque converter clutch did not lock up when the PCM sent the command. Enabling conditions: No engine or transmissions codes are present, vehicle speed was under 70 MPH, TPS was under 33% open. When the PCM commanded the torque converter to lock, no change was detected in engine speed. Blocking action: This code can block the following monitors: none.
Testing: Check torque converter solenoid for proper operation.
P1740 TCC O/D SOL PERFORMANCE (GAS)
Theory of Operation
The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which improves fuel economy.
When Monitored
The Torque Convertor Clutch (TCC) and Overdrive Clutch (OD) will be tested each time the PCM requests TCC engagement in 3rd gear and OD.
Set Condition
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or OD. This indicates a malfunctioning torque convertor or overdrive clutch.
Possible Causes
* ENGINE DTCS PRESENT
* TRANSMISSION DTCS PRESENT
* TRANSMISSION TEMPERATURE TOO COLD
* OIL PAN CONTAINS EXCESSIVE DEBRIS
* 3-4 SHIFT SOLENOID
* SHAFT OR SEAL DAMAGE
* TCC SOLENOID
* TORQUE CONVERTER

Sep 25, 2008 | 2005 Dodge Ram 3500

1 Answer

2002 Dodge 2500 diesel auto


could be a bad lockup solenoid or a bad torque converter

Aug 25, 2008 | 2001 Dodge Ram 2500 Truck

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