This bulletin applies to 2015 RAM 2500, 3500 and 3500 cab chassis vehicles equipped with a 6.4L engine and the 66RFE six-speed automatic transmission, built between Sept. 10, 2014 and Oct. 1, 2014. A small number of torque converters were manufactured with the oil grooves on the internal friction discs too wide. This may result in the transmission slipping under heavy loads, causing premature wear.
1. Disconnect and isolate the negative battery cable.
2. Raise and support the truck.
3. Remove the starter to gain access to the inside of the bellhousing.
4. Using a suitable socket and ratchet, rotate the engine crankshaft clockwise until the bar code label on the torque converter is visible via an inspection mirror. If necessary, mark the torque converter using a marker to ensure full rotation has been achieved.
5. View and record the serial number on the label beginning with TTP. Only the first 7 digits on the bar code serial number will be used to determine replacement. If the bar code is missing, the torque converter should be considered suspect and should be replaced.
6. If the bar code serial number falls between TTP2544xxxxx and TTP2734xxxxx, replace the torque converter.
The replacement torque converter is available as P/N RL143186AB.
