Symptoms
The 4WD indicator keeps flashing after you shift, or the front axle won't engage.
The fix, step by step
- CarsGuide's expert says it's 'likely to be a problem with the actuation system for the front diff' and lists the solenoids, vacuum line, actuator and diff sensor.
- Start with the cheap parts: check every vacuum hose to the front-diff actuator for cracks and loose ends, test the solenoids, then the actuator and sensor.
- Bring a Trailer's 2001 Limited had its transfer-case switches replaced, so check those and their wiring too.
- Afterwards, cycle through every mode on loose ground and use 4WD regularly.
Tools & part numbers
- Hand vacuum pump with gauge
- multimeter
- scan tool
- basic hand tools.
Where to buy the parts
Drivetrain parts, 2004 Montero 3.8 V6RockAuto ↗Amazon ↗
Electrical switch and relay parts, 2004 Montero 3.8 V6RockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Mitsubishi Pajero / Montero (Third Generation) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.