99-3-5 - Noisy T/C*
Problem - Some 1999 F-series with the 4R100 transmission may exhibit a rattle/scraping noise in the converter housing area of the transmission case.
Action - To diagnose, place gear selector in park and using a break out box, ground pin 54 (TCC). This will fully apply the torque converter clutch. Cycle the torque converter clutch on and off a few times by applying and removing the ground to pin 54. If the rattle/scraping noise is not present when the converter clutch is applied (pin 54 grounded), replace torque converter.
Affected Vehicles - 1999 F-Series Super Duty, 7.3 DIT, 4R100 and 1998-1999 E-Series built after 1/5/98. Some 1999 F-series 250HD/350/450/550 Super Duty and 1998/1999 Econoline Series (built after 1/5/98) and equipped with 7.3l diesel
Parts - Updated Converter: XL3Z-7902-DARM