TSB 21-007-06 addrresses an issue with delayed engagement with the 545RFE transmission.
P0868 - Line Pressure Low.
The customer may experience an initial delayed shift engagement following an extended
off (not running) period of time, generally after being parked overnight. The initial shift
engagement may feel like a delay or slip when a transmission gear (reverse or drive) is
first selected after engine start.
The customer may also experience a MIL illumination. Investigation may determine that
the MIL is due to one or more of the following Diagnostic Trouble Codes (DTC's):
This DTC will be the most frequently occurring DTC for
the delayed shift condition.
P0944 - Loss Of Hydraulic Pump Prime.
P0731 - Gear Ratio Error In 1st.
P0736 - Gear Ratio Error In Reverse.
P0841 - LR Pressure Switch Rationality.
P0876 - UD Pressure Switch Rationality.
The delayed engagement and MIL condition (DTC's) may be caused by a suspect
transmission cooler return filter with a part number of 04799662AB. A suspect
cooler return filter may cause the transmission sump filter to split at its
plastic-to-metal crimp. If the transmission sump filter becomes split at the crimp, then oneor more of the above DTC's may also occur.