Transfer Case: IWE
WARNING: This page is about a different variant/trim than selected.
The IWE system consists of the following components:
- Vacuum reservoir
- IWE solenoid
- IWE s (spring-loaded vacuum hubs)
- Vacuum hoses
- Check valve
The IWE system uses vacuum hubs that engage or disengage the front wheel hubs from the front halfshafts.
The IWE solenoid receives engine vacuum from the vacuum reservoir.
When the 4 wheel drive system is in 2H mode, the TCCM supplies a ground path to the IWE solenoid to apply vacuum to the IWE (disengaging the front hubs from the front halfshafts). In 4WD mode, the TCCM does not supply the ground path to the IWE solenoid, vacuum is not applied to the IWE and an internal spring keeps the front hubs engaged to the front halfshafts.