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Replace The Front Wheel Hub And Bearing on a 4 Wheel Drive S-Series Truck

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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.

Required Tools
Required Parts
Step by Step Instructions

Lift the Truck and Remove the Front Wheels

1

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.

2

Remove the wheel by removing the center cap and lug nuts as needed.

Remove the Axel Nut and Bolt

3

Remove the cotter pin from the axle.

Image 7102 from Replace the Front Wheel Hub And Bearing on a 4 Wheel Drive S-Series Truck
4

Remove the Axle nut locking cap

Image 7103 from Replace the Front Wheel Hub And Bearing on a 4 Wheel Drive S-Series Truck
5

Remove the 36 mm axel nut.

I highly recommend an impact gun for this, but it can be done with a breaker bar.

Image 7104 from Replace the Front Wheel Hub And Bearing on a 4 Wheel Drive S-Series Truck

Remove the Brake Caliper

6

Remove the 2 x 3/8" allen slide pins from the caliper

7

Remove the caliper and hang it to the side using a metal coat hanger.

8

Remove the brake disc.

Remove Wheel Hub

9

Disconnect the ABS wheel speed sensor if your vehicle has one.

10

Remove the 3 x 18mm bolts holding the wheel hub on from the back of the spindle.

11

Remove the Wheel Hub.

12

Remove the dust shield with built in ABS wheel speed sensor.

Clean and Grease the Bearing Surface

13

Clean all the old grease out of the spindle. Make sure no metal shavings or grit remain.

14

Apply a healthy amount of new grease.

15

Clean all the metal shavings that have built up on the magnetic wheel speed sensor.

Install the New Wheel Hub

16

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.

Image 7101 from Replace the Front Wheel Hub And Bearing on a 4 Wheel Drive S-Series Truck
17

Torque all 3 hub bolts to 77 ft-lbs. (for 1986-1996 S-series models with 4WD).

Finishing Up

18

Re-install the brake disc.

19

Install the brake caliper.

20

Install the axel nut to 181 ft-lbs. and install the retainer and cotter pin.

21

Install the wheel torque wheel lugs to 100 ft-lbs. (again 86-96 4WD).

There are 2 Comments.

Say Something.
reply:

Excellent new section where you can search your vehicle and while CV Joints aren't tuning every Sy/Ty guy knows they're a pain to change every 3-5k miles, one of the reasons I decided to make mine 4x4 instead of AWD.Thanks for this step by step tutorial guys.

reply:

Great Article. I am curious though, if you have ditched the ABS, is it necessary to use this wheel hub and the dust shield?

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