Replace The Front Wheel Hub And Bearing on a 4 Wheel Drive S-Series Truck
If your wheel bearing is making noise on your GMC Syclone, Typhoon, or any of the other 4WD S-Series trucks with ABS - Then this guide will help you replace them today.
Lift the Truck and Remove the Front Wheels
Safely lift the truck off the ground using jacks and a jack stands or a vehicle lift.
NEVER get under a vehicle that is only lifted using a jack. Jack stands are a requirement for your safety. Being crushed under your car is the dumbest thing that can happen to you this weekend.
Remove the wheel by removing the center cap and lug nuts as needed.
Remove the Axel Nut and Bolt
Remove the cotter pin from the axle.
Remove the Axle nut locking cap
Remove the 36 mm axel nut.
I highly recommend an impact gun for this, but it can be done with a breaker bar.
Remove the Brake Caliper
Remove the 2 x 3/8" allen slide pins from the caliper
Remove the caliper and hang it to the side using a metal coat hanger.
Remove the brake disc.
Remove Wheel Hub
Disconnect the ABS wheel speed sensor if your vehicle has one.
Remove the 3 x 18mm bolts holding the wheel hub on from the back of the spindle.
Remove the Wheel Hub.
Remove the dust shield with built in ABS wheel speed sensor.
Clean and Grease the Bearing Surface
Clean all the old grease out of the spindle. Make sure no metal shavings or grit remain.
Apply a healthy amount of new grease.
Clean all the metal shavings that have built up on the magnetic wheel speed sensor.
Install the New Wheel Hub
Re-assemble the wheel hub.
Start by putting a bolt through the hole in the spindle. Then line up the dust shield, and carefully start the threads in the hub.
Continue with the remaining 2 bolts.
Torque all 3 hub bolts to 77 ft-lbs. (for 1986-1996 S-series models with 4WD).
Re-install the brake disc.
Install the brake caliper.
Install the axel nut to 181 ft-lbs. and install the retainer and cotter pin.
Install the wheel torque wheel lugs to 100 ft-lbs. (again 86-96 4WD).