A/T - 4R100 Rattling Noise From Torque Converter Area

Article No.
99-3-5

02/22/99

^ NOISE - "RATTLING" NOISE FROM CONVERTER
AREA - VEHICLES EQUIPPED WITH 4R100
TRANSMISSION AND 7.3L DIESEL ENGINE

^ TRANSMISSION - 4R100 - "RATTLING" NOISE
FROM CONVERTER AREA - VEHICLES EQUIPPED
WITH 7.3L DIESEL ENGINE

LIGHT TRUCK:
1998-99 ECONOLINE
1999 F-250 HD, F-35O, SUPER DUTY F SERIES

ISSUE
A "rattling" noise in the converter housing area when the torque converter clutch is not engaged may occur on some vehicles. This may be caused by impact between the converter piston and cover spline teeth internal to the cover.

ACTION
Replace the torque converter. The revised torque converter incorporates a new piston and damper design which reduces the possibility of impact between the clutch piston and cover spline teeth. Refer to the following Service Procedure for details.

NOTE
DO NOT USE THIS CONVERTER TO FIX OTHER CONVERTER ISSUES. THIS CONVERTER IS SPECIFICALLY FOR REPAIR OF 1998 AND 1999 DIESEL RATTLE ISSUES AS MENTIONED IN THIS TSB.

SERVICE PROCEDURE

1. Run self test and repair and diagnose any Diagnostic Trouble Codes (DTCs) present before continuing.

2. If rattling is still present, place the transmission gear selector lever in Park.

3. Using a breakout box, ground Pin 54 (TCC). This will fully apply the torque convener clutch.

4. Cycle the torque converter clutch on and off a few times by applying and removing the ground to Pin 54.

5. If the rattling/scrapping noise is not present when the convener is applied (Pin 54 grounded), replace the Torque Converter (XL3Z-7902-DARM).

PART NUMBER PART NAME

XL3Z-7902-DARM Torque Converter

OTHER APPLICABLE ARTICLES: NONE

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME

99O3O5A Perform Diagnostics And 3.2 Hrs.
Replace Torque Converter
(4X2)

990305B Perform Diagnostics And 4.1 Hrs.
Replace Torque Converter
(4X4)

DEALER CODING
CONDITION
BASIC PART NO. CODE
7902 33

OASIS CODES: 504000, 597997, 702000, 702100