Dakota 2WD L4-2.5L VIN P (2001)
Torque Converter Clutch Solenoid: Customer Interest
MIL ON - TCC/OD Solenoid Performance
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
