Transfer Case

Transfer Case

Electronic Shift-On-The-Fly (ESOF) System

The ESOF (Electronic Shift-On-The-Fly) transfer case system consists of the following components:

- Mode Select Switch (MSS), located on the instrument panel

- Transfer case assembly (includes shift motor and synchronization clutch)

- Transfer Case Control Module (TCCM)

The Borg-Warner 4419 electronic shift transfer case is a 2-piece magnesium design. The unit transfers engine power from the transmission to the front and rear axles. Vehicles equipped with an ESOF (Electronic Shift-On-The-Fly) system allow the operator to choose between 2-Wheel Drive (2WD) (2H) and 2 different 4WD (Four-Wheel Drive) modes. The transfer case is shifted electronically based on the MSS (Mode Select Switch) position. Under normal driving conditions, the transfer case is in 2WD (2-Wheel Drive) (2H), but when desired, the operator may shift into 4WD (Four-Wheel Drive) high (4H) or 4WD (Four-Wheel Drive) low (4L). The operator can shift between 2WD (2-Wheel Drive) (2H) and 4WD (Four-Wheel Drive) high (4H) at any speed. When shifting into or out of 4WD (Four-Wheel Drive) low (4L) range, the TCCM (Transfer Case Control Module) requires that the vehicle speed is less than 5 km/h (3 mph) and the transmission in NEUTRAL.

The transfer case is equipped with an electronically controlled high torque capacity clutch which is located inside the case. This clutch is used to synchronize the speed of the front driveline with the rear driveline during 2WD (2-Wheel Drive) (2H) to 4WD (Four-Wheel Drive) high (4H) shifts. The transfer case is lubricated by a positive displacement fluid pump that channels fluid flow through holes in the rear output shaft.

2-Speed Torque-On-Demand

The 2-speed torque-on-demand transfer case system consists of the following components:

- MSS (Mode Select Switch), located on the instrument panel

- Transfer case assembly (includes shift motor and synchronization clutch)

- TCCM (Transfer Case Control Module)

The Borg-Warner 2-speed torque-on-demand transfer case is a 2-piece magnesium design. The transfer case transfers engine power from the transmission to the front and rear axles. Vehicles equipped with the 2-speed torque-on-demand system allow the operator to choose between 2WD (2-Wheel Drive) and 3 different 4WD (Four-Wheel Drive) modes. The transfer case is shifted electronically based on the MSS (Mode Select Switch) position. Under normal driving conditions, the unit is in 2WD (2-Wheel Drive) (2H), but when desired, the operator may shift into 4WD (Four-Wheel Drive) high (4H), 4WD (Four-Wheel Drive) low (4L) or 4WD (Four-Wheel Drive) AUTO (4A). When shifting into or out of 4WD (Four-Wheel Drive) (4L) range, the TCCM (Transfer Case Control Module) requires that the vehicle speed is less than 5 km/h (3 mph) and the transmission is in NEUTRAL.

The transfer case is equipped with an electronically controlled high torque capacity clutch which is located inside the case. This clutch is used to synchronize the speed of the front driveline with the rear driveline during 2WD (2-Wheel Drive) (2H) to 4WD (Four-Wheel Drive) high (4H) or 4WD (Four-Wheel Drive) AUTO (4A) shifts. The clutch also provides torque to the front driveline in all 4WD (Four-Wheel Drive) modes. The transfer case is lubricated by a positive displacement fluid pump that channels fluid flow through holes in the rear output shaft.