MP1522 Transfer Case - Description

DESCRIPTION




MP1522 EXPLODED VIEW





Command Trace(R) II with the new MP1522 two-speed, part-time four-wheel drive transfer case is the entry level four-wheel drive system. Functionally, the system performs the same way as other two-speed, part-time transfer cases. The most significant difference is electric shift, engaged with a console-mounted switch.

Command Trac(R) II is a part-time four-wheel drive system - 2WD High is the usual driving mode, with the front axle spinning freely and a power directed to the road rear wheels. Selecting 4WD High Lock, via the console-mounted switch, locks the front and rear driveshafts together; the two then rotate at the same and provide a 50 front / 50 rear torque split. It is for use only on slippery or loose surfaces, such as snow or dirt. Driving on dry roads can result in driveline binding, resulting in undesirable driving dynamics and potential vehicle damage. It can be engaged at speeds under 55 MPH. A Neutral mode permits towing without having to disconnect the drive shafts. A pushpin button is provided to shift the transfer case into Neutral. For severe off-road situations, 4WD Low can be engaged at speeds of 2-3 MPH. The front and rear drive shafts are locked together, and a second gear set multiplies torque by 2.72:1, providing traditional Jeep capability.

The MP1522 transfer case provides the following benefits:

- Electric shift operation, with a console-mounted switch that replaces the shift lever typical of systems with mechanical linkage.
- Command Trac(R) II with smooth operation and improved NVH control compared to systems with mechanical linkage.
- Traditional 2WD, 4WD Lock, Neutral and 4WD Low operation modes, and shift-on-the-fly capability.
- 4WD Low operation mode provides an advantage over vehicles equipped with a single-speed all-wheel drive transfer case.
- Enhanced traction and stability provided by the Traction Control and Electronic Stability Program (ESP) working in tandem with four-wheel drive, including Hill Start Assist, Hill Descent Control and Trailer Sway Control.
- Maintenance-free.

OPERATING RANGES

Transfer case operating ranges are:

- Operating positions: 2WD - 4WD LOCK- N - 4WD LOW.
- 2WD - 2 Wheel Drive.
- 4WD LOCK- 4 High Part Time.
- N - Transfer case neutral for 4-wheel flat recreational towing.
- 4WD LOW- Low range (2.72:1) part time mode.