Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
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The drag link connects the pitman arm to the right front wheel, this is what steers the vehicle. It is 2 piece with a sleeve in the middle to adjust the center of the steering wheel.
The tierod is 3 piece, 2 tierod ends and a center link. These keep the front wheels pointed in the same direction and are used to adjust total toe
The steering shock absorbs some of the side to side movement in the front axle and helps control the steering while turning and hitting bumps, say on a long sweeping turn.
The trac bar is what locates the front axle under the vehicle. It connects the frame to the front axle and keeps it centered. The trac bar connects to the frame, the trac bar balljoint presses into the axle and connects the trac bar to the axle. It pivots to allow loading and unloading of the suspension above the axle. The trac bar contains an upper bushing that is serviceable, there is almost never any reason to replace the bar itself. The trac bar ball joint is also serviceable. You will need a ball joint press to remove and install both the bushing and the ball joint.
It it entirely possible all of these components need replaced but I would have to see for myself, they rarely need replaced all at once. Honestly your ball joints usually wear out long before any of the above.
Ford Senior Master Tech
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