TM 9-2320-272-24-3
Section VII. TRANSMISSION MAINTENANCE
4-69. TRANSMISSION MAINTENANCE INDEX
PAGE
PARA.
TITLE
NO.
NO.
General
Transmission
Replacement (In-Vehicle)
Transmission
Replacement (Out-of-Vehicle)
Transmission
Select Lever Replacement
Transmission
Shift Tower Replacement
Transmission
Shift Cable Maintenance
Transmission
Selector Shaft Oil Seal Replacement
Transmission
Mount Bushing Replacement
Transmission
Output Shaft Yoke and Oil Seal Replacement
Transmission
Lubrication Valve Replacement
Transmission
4-70. GENERAL
a . M939, M939A1, and M939A2 series vehicles utilize one of two Allison MT654CR model automatic
transmissions. Early model (part number 6885292) and later model (part number 23040127) transmissions
are easily identified by the part number on the equipment data plate located on the lower right rear of the
transmission housing. The major differences between models is that later models use a larger oil pump and
a different converter hub. Both models are interchangeable, replaced, and maintained the same way for all
series vehicles. Some internal components are not interchangeable and are noted in the procedures.
4-465