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angelg ... 3/6/2012

1998 GMC W3500 Forward W3S042 8 Cyl 5.70L

Steering & Suspension

how do I replace lower balljoints on my 4wd pickup

what all do I need don you have pictures or a copy of a manule for this type of truck

1 Answer

Jay Giron

Jay Giron 3/6/2012

Lower ball joint:

Place jack under lower control arm, then raise the jack slightly.
Remove or disconnect the following:
Tire and wheel assembly
Brake caliper and position it to the side
Cotter pin and the lower ball joint retaining nut. Using the proper tool separate the ball joint from its mounting. Support the knuckle assembly so its weight will not damage the brake hose.
Ball joint out of the lower control arm, using tool J-9519-30-D or equivalent.
To install:
Start the new ball joint into the control arm. Position the bleed vent in the rubber boot facing inward.
Install or connect the following:
Ball joint into the control arm until fully seated
Lower ball joint stud into the steering knuckle
Brake caliper, if removed
Ball stud nut. Torque the nut to 90 ft. lbs. (122 Nm) plus the additional tighten necessary to align the cotter pin hole. Do not exceed 130 ft. lbs. (175 Nm) or back the nut off to align the holes with the pin.
New lube fitting and lubricate the new joint.
Tire and wheel

Image: http://content.chiltonsonline.com/.../7924KG34.gif

Upper ball joint:

Remove or disconnect the following:
Brake hose bracket from the control arm
Using a 1/8 in. drill bit, drill a pilot hole through each ball joint rivet.
Drill out the rivets with a 1/2 in. drill bit. Punch out any remaining rivet material.
Cotter pin and nut from the ball stud
Support the lower control arm.
Stud from the knuckle. Using a ball joint separator
To install:
Install or connect the following:
New ball joint on the control arm

Service replacement ball joints come with nuts and bolts to replace the rivets.

Bolts and nuts. Torque the nuts to 17 ft. lbs. (23 Nm) for 15- and 25-Series, 52 ft. lbs. (70 Nm) for 35-Series.

The bolts are inserted from the bottom.

Start the ball stud into the knuckle. Ensure it is squarely seated. Install the ball stud nut and pull the ball stud into the knuckle with the nut. Tighten the nut after the vehicle wheels are on the ground and the suspension is loaded.
Once the weight of the vehicle is on the wheels tighten the nut to 84 ft. lbs. (115 Nm).


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