4X4 & AWD System Service

Whether you're navigating Ontario's winter roads or pushing your truck off the beaten path, your 4x4 or AWD system needs to engage reliably, transfer power precisely, and hold up under the demands you put on it. At Northstar Automotive Group in Gormley, ON, Master Mechanic Dawood Motala and his team of certified technicians provide comprehensive 4x4 and AWD system services for every make and model — from routine fluid changes and actuator replacements to full differential rebuilds and axle upgrades. These are systems that rarely give warning before they fail, which is why regular inspection and maintenance are critical to catching problems before they leave you without drive when you need it most.

Fluid Replacement & Top-Up

We replace and top up transfer case, differential, and AWD coupling fluids with the correct specification fluids for your specific system, preventing the accelerated wear and component damage that comes from degraded or incorrect fluid in your drivetrain.

Front & Rear Locker Installation

We install front and rear differential lockers with proper setup and adjustment, giving your 4x4 the maximum traction capability it needs for off-road use while ensuring the locker engages and disengages reliably when you need it.

Differential Rebuild

We rebuild worn or damaged differentials with precision setup of ring and pinion gear backlash, bearing preload, and pattern contact, restoring smooth, quiet, and reliable power distribution to your wheels that a simple fluid change can't fix.

Front Differential Replacement

We replace failed front differentials with proper fluid fill, axle seal inspection, and driveshaft torque procedures, restoring full four-wheel drive capability and eliminating the grinding, clunking, and vibration a failed front diff produces.

Axle Shaft & Seal Replacement

We replace worn or damaged axle shafts and leaking axle seals that cause fluid loss, clicking during turns, and eventual loss of drive — addressing both the symptom and the underlying cause to ensure the repair lasts.

Dana 44/60 & Other Axle Upgrades

We install and set up Dana 44, Dana 60, and other heavy-duty axle upgrades with proper pinion angle, bearing preload, and gear pattern setup — giving your 4x4 the axle strength it needs to handle larger tires, lockers, and serious off-road use.

4WD Actuator Replacement

We diagnose and replace faulty 4WD actuators that prevent your front axle from engaging properly, restoring the reliable four-wheel drive engagement your vehicle needs when road conditions demand it most.

Vacuum Disconnect Repair

We repair vacuum-operated front axle disconnect systems that fail to engage four-wheel drive due to cracked lines, failed actuators, or faulty solenoids — a commonly overlooked system that leaves many trucks stuck in two-wheel drive without the driver knowing why.

Electronic 4WD System Diagnosis

We use advanced diagnostic tools to read and interpret 4WD system fault codes, sensor data, and module communication errors, identifying exactly why your four-wheel drive system isn't engaging, shifting, or behaving as it should.

All-Wheel Drive Coupling Replacement

We replace worn or failed AWD couplings and rear drive unit assemblies that cause vibration, binding in turns, and loss of rear wheel drive on all-wheel drive vehicles — restoring the seamless, automatic traction distribution your AWD system was designed to provide.

Prop Shaft Center Bearing Replacement

We replace worn prop shaft center support bearings that cause vibration and droning at highway speeds, restoring smooth driveshaft operation and preventing the accelerated wear on surrounding components that a failed center bearing produces.