P1740 code on 2001 ram 1500 tcc-overdrive solenoid . how to test & replace

P1740 Torque Converter Clutch or Overdrive Solenoid ...

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Faulty Torque Converter Clutch (TCC) and Overdrive (OD) Solenoid. ... Torque Converter Clutch (TCC) and Overdrive (OD) clutch are tested when the Powertrain Control Module (PCM) requests TCC engagement in 3rd gear and Overdrive. The P1740 code will set if expected RPM drop is not

P1740 DODGE Torque Converter Clutch or Overdrive

You are having a Transmission Issue. There is a known issue with the TCC Lock-Up Solenoid. Once you Clean and Replace the Solenoid, your problem will go away (95% sure)

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.

This is the OD Solenoid. There is a TSB out that covers the 2000-2001 Ram truck.

EFFECTIVE DATE: Oct. 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 0801XX).
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.
DIAGNOSIS:
1. Warm the transmission to normal operating temperatures.
2. Using the DRB IIIò, perform a torque converter clutch (TCC) stall test. The stall test
has been revised so that the TCC remains engaged for a period of four (4) seconds.
NOTE: THE DRB III 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.
3. If the engine stalls as a result of the TCC stall test, then perform the Repair
Procedure.
4. If the engine does not stall, as a result of the TCC stall test, then further diagnosis is
required. The technician may want to consider the following components during
their additional diagnosis: a cut or worn input shaft seals, a missing pump lock-up
circuit check ball, or worn converter hub, input shaft, reaction shaft, and pump rotor.
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission of DaimlerChrysler Corporation.
21-11-00 -2-
PARTS REQUIRED:
1 04617015 Plate, Pressure Boost Valve Cover (46RE)
1 02464324AB Gasket, Trans Pan
10(AR) 05010124AA ATF+3, Transmission Oil Type 7176 (2000 M.Y.)
10(AR) 05013457AA ATF+4, Transmission Oil Type 9602 (2001 M.Y.)
REPAIR PROCEDURE:
1. Clean the pressure boost valve cover plate to remove any dirt or rust inhibitor prior to
installation. The revised cover plate will have a 1.75 mm (0.069 inch) orifice hole
versus a 1.22mm (0.048 inch) orifice hole in the original plate. Make sure it is clean.
2. Using the appropriate Service Manual, Group 21 – Transmissions and Transfer Case,
replace the transmission pressure boost valve cover plate p/n 04617012.
3. Verify fluid level after warming up the transmission and cycling the shift lever several
times.
4. Verify, and if required, adjust the transmission shift linkage and the transmission
throttle valve cable per the appropriate Service Manual procedures.

I found that the code is set for:

P1740....TCC Solenoid or Overdrive Solenoid performance

which indicates that a rather inexpensive fix is in order, not a complete transmission replacement!! The TCC is the solenoid which controls the locking of the transmission converter so that you get better gas mileage with no "slippage" while at highway speeds, which is normal when the converter is unlocked as you slow down. If it is locked and the solenoid fails to release it the car will stall when you come to a stop since the fluid in the converter fails to act as a clutch and the engine is connected directly to the transmission input shaft. If it never locks then the oil in the transmission will overheat at highway speeds since ther "slippage" will always be present in the converter cauasing frictional heating of the oil.

Whenever you get a quote from a shop ALWAYS get at least two more!!! No matter what the job is, even a muffler replacement get many quotes. Go to a reliable transmission repair shop and ask for their opinion. In my humble opinion the shop that told you that you need a new transmission is just hungry for work - stay away!!!!

Bob

yes,You need to have a shop check this problem out,
P1740=TCC solenoid or overdrive solenoid performance,

that is your torque convertor clutch solenoid.

I had the same code on my 2001 dodge 2500. The truck wouldn't shift from 3-4. I pulled the trans pan off and replaced a broken spring ($2.00). It is behind a thin plate with 3-4 small torq screws. You don't have to remove the valvebody. Only took me 45 minutes to fix.

I would like to give thanks to Jeff Russel from Teal automotive. He said this is a very common problem. He sells any part for any automatic Transmision and his prices are very affordable.
Here is a link to the website.
http://www.tealautomotiveinc.com/

Hope this helps.

There is one solenoid assy with two solenoids on it. One for the TCC and other for OD. in my experience, P1740 is caused by a couple of things. The torque converters are a subject of trouble for one - I always replace them - the other are the input sealing rings on the input shaft. Older designs leak pressure. Always replace with the plastic - **** end type which is the update today. P1740 has nothing to with the governor solenoid or sensor

For a few years, at least in my area, there was a issue with the tcc solenoid. It involved not only replacing the solenoid( dropping the pan and unbolting from the valve body) but also flashing or updating the control module.once both repairs are complete you should have no problems. A good dealer will help you out.

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