A Pitman arm is part of the steering mechanism on most trucks and SUV's. The arm is connected to the steering gearbox and uses seals to keep fluid running through the system. Periodic maintenance, including seal replacement, is required on a Pitman shaft. Over time Pitman shaft seals will become worn and can deteriorate, resulting in steering play. Using the right tools, you can replace a Pitman shaft seal in your own garage.
Turn the vehicle engine off. Place the transmission in neutral. Engage the parking brake.
Jack the front of the vehicle up. Place jack stands under the frame on both sides of the vehicle for security.
Mark the position of the Pitman arm in relation to the shaft case. This is done just in case the arm can be reinstalled in different positions. Remove the Pitman arm with the Pitman arm puller.
Clean out the area around the shaft and around the C-shaped retaining ring that holds the seals and metal washers in position using a shop rag. Place a drain pan under the steering gear.
Remove the retaining ring using internal snap-ring pliers. Start the engine. Turn the steering wheel fully to the left and hold for a few seconds. Repeat turning the steering wheel a few times. This action will force the shaft seals and washers out of the gear housing.
Turn off the engine. Pull off the Pitman shaft seals and washers. Lubricate the replacement seals and washers and place them in the gear housing. Replace the retaining clip.
Fill the steering reservoir with fluid to the proper level. Turn on the engine and rotate the steering wheel back and forth. Check for any fluid leakage. If no fluid is leaking, then you are good to go.
