rokspydr

Hi, A friend stopped by tonight with his 01 CTD and when he stopped the truck it wanted to keep going as if the converter was locking up. You need to stand on te brakes to hold it still and when you release the brakes the truck takes off. any ideas?

Marc

RockysInMyBlood

Is his truck stock or does it have a 3rd party tranny controller, like the ATS Co-Pilot? When I installed the Co_Pilot one of the dip switch settings allowed for lockup as low as 8 mph, so I figure that if the PCM or another controller provides the tranny the signal to lock, it could lock just about any time. But, if the converter was locked and you were stopped with the brake down, wouldn't it kill the engine?

rokspydr

truck is stock. when you stop it seems to increase in rpm to compensate for the lock up. Think of it as holding rpm at say 1800 in gear. but when you put it in neutral or park it idle's normally. could it be the PCM?

RockysInMyBlood

Don't know. Your idle increases in gear, drops to normal in neutral or park ... Almost like there's something connecting the trans and the throttle. The throttle valve cable that runs from the tranny to the throttle does make a connection, kinda far out that it would be doing this, though.

rokspydr

he said it feels like the converter is locking up.

dj_souvlaki

if its revving up maybe an apps reset would help?

SMOKNISB

If the converter was locked up at idle, the truck would stall. And I dont think the valve body will let it lock up in 1st gear anyway.

rokspydr

so I got an update, if he goes from foreward to reverse or vice versa it will stall.

johnh

i think there's a converter lockup solenoid in the transmission that has gone bad.... it's a common problem on a lot of gm transmissions.... i just looked in my book, it's called "converter clutch solenoid" i t shouldn't cost very much ...... pretty easy to change, drop the pan and there it is, i'll try to get a pic posted

mysterync

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.

DIAGNOSIS:

1. Warm the transmission to normal operating temperatures.

2. Using the DRB III(R), 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(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.

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.








PARTS REQUIRED:

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 1.22 mm (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.


POLICY: Reimbursable within the provisions of the warranty.







TIME ALLOWANCE:

FAILURE CODE: P8 - New Part


Part Number Bold and Under Lined


A518/46RH, 46RE
Solenoid
3 - With Lock-Up Valve 52118500AB $88.45