C 2500 Truck 2WD V8-454 74L (1985) Transmission: 4L60 Slipping or No 3rd/4th Gear
1APM ........................................................
1DBM
1CNM ........................................................
1CHM
1CYM ........................................................
1CHJM
1FYM ........................................................
1FUM
1KWM ........................................................
1KRM
1LHM ...............................................................
none
1RCM ........................................................
1RAM
1RDM ........................................................
1WCM
1YHM ........................................................
YDM
Overhaul kits contain both the previous and new 3-4 clutch friction material along with an instruction sheet that explains which material to use.
Previous and new 3-4 friction plates can be ordered individually.