GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Chassis Greasing

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FRONT SUSPENSION



See Figure 1

Every year or 7,500 miles the front suspension ball joints, both upper and lower on each side of the vehicle, must be greased. Most vehicles covered in this guide should be equipped with grease nipples on the ball joints, although some may have plugs which must be removed and nipples installed.

Raise the front end of the vehicle and safely support it with jackstands. Block the rear wheels and firmly apply the parking brake. If the vehicle has been parked in temperatures below 20°F (-7°C) for any length of time, park it in a heated garage for an hour or so until the ball joints loosen up enough to accept the grease.

Depending on which front wheel you work on first, turn the wheel and tire outward, either full lock right or full lock left. You now have the ends of the upper and lower suspension control arms in front of you; the grease nipples are visible pointing up (top ball joint) and down (lower ball joint) through the end of each control arm. If the nipples are not accessible enough, remove the wheel and tire. Wipe all dirt and crud from the nipples or from around the plugs (if installed). If plugs are on the vehicle, remove them and install grease nipples in the holes (nipples are available in various thread sizes at most auto parts stores). Using a hand operated, low pressure grease gun loaded with a quality chassis grease, grease the ball joint only until the rubber joint boot begins to swell out.

Do not pump so much grease into the ball joint that excess grease squeezes out of the rubber boot. This destroys the watertight seal.



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Fig. Fig. 1: Front suspension and steering linkage lubrication fitting locations.

STEERING LINKAGE



The steering linkage should be greased at the same interval as the ball joints. Grease nipples are installed on the steering tie rod ends on most models. Wipe all dirt and crud from around the nipples at each tie rod end. Using a hand operated, low pressure grease gun loaded with a suitable chassis grease, grease the linkage until the old grease begins to squeeze out around the tie rod ends. Wipe off the nipples and any excess grease. Also grease the nipples on the steering idler arms.

PARKING BRAKE LINKAGE



See Figure 2

Use chassis grease on the parking brake cable where it contacts the cable guides, levers and linkage.



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Fig. Fig. 2: Parking brake cable grease points.

AUTOMATIC TRANSMISSION LINKAGE



Apply a small amount of clean engine oil to the kickdown and shift linkage points at 7,500 mile intervals.

 
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