PRIMARY POWERTRAIN SYSTEM CONTINUED
Transmission and Torque Converter
The transmission has eight forward gears and one reverse. The transmission is controlled electronically by the
transmission/chassis ECM. The torque converter of the transmission works in converter drive (unlocked) in
reverse, forward 1, and forward 2 gears. In all other forward gears, the torque converter is in direct drive (locked).
Differential and Final Drives
Do not engage the differential lock while the machine is moving. Engaging the differential
lock can limit steering control. Use extreme caution when driving with the differential lock
engaged. Failure to follow this warning may result in serious injury or death to personnel.
The differential and final drive transmits power from the transmission to the drive wheels. The differential is an open
differential with an electronically controlled and air actuated differential lock. When the differential lock is activated,
both drive wheels are mechanically locked. The wheels will rotate together allowing for greater traction, but result-
ing in higher steering effort and reduced steering capability. When the differential lock is de-activated, both drive
wheels are mechanically unlocked allowing them to rotate independently of each other. This results in reduced
steering effort and greater steering capability.
Figure 5. Powertrain.