Transmission Description - Overview: Overview
The 10R80 automatic transmission is a 10-speed electronically controlled transmission with a main control valve body unit with 8 solenoids and a torque converter. Gear selection is achieved by the control of transmission fluid to operate various internal clutches. The PCM for gas engine applications or the TCM for diesel engine applications operates the electrical components and provides control of gear selection, shift pressure and torque converter slip.
This transmission includes:
- Torque converter with an integral converter clutch
- Electronic shift and pressure controls
- Four planetary gearsets
- Two multi-disc holding clutches
- Four multi-plate drive clutches
- One one way holding clutch
- Main control valve body unit
The main control consists of a valve body assembly with solenoids inside the transmission and is controlled by a PCM or a TCM. The PCM or TCM operates the electrical components to provide refined engagement feel, shift feel, and shift scheduling.
Engine power reaches the transmission by a torque converter with an integral clutch. The 10 forward gears and one reverse gear are obtained from 4 planetary gearsets.