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1996 Ta Control Arm

Through experience Jeffery sets the lower control arms up at 19 7/8 inches as a baseline, by evenly threading in the front and rear rod ends, and tightening the jam nut. One of the benefits of a double-adjustable control arm is to make sure that the rearend housing is located equidistance from a reference point forward of the rear wheels (i.e., the lower edge of the wheelwell). If the left or right wheel is even a minute amount out (1/16-inch or less), the car will pull away from the wheel that is most forward. According to Jeffery, "This is the single most important, critical element-other than the setup on the torque arm. In certain instances, tolerances have been measured as high as 1 1/2 inches."
1996 Pontiac Trans Am - Mad ETS - Tech

Through experience Jeffery sets the lower control arms up at 19 7/8 inches as a baseline, by evenly threading in the front and rear rod ends, and tightening the jam nut. One of the benefits of a double-adjustable control arm is to make sure that the rearend housing is located equidistance from a reference point forward of the rear wheels (i.e., the lower edge of the wheelwell). If the left or right wheel is even a minute amount out (1/16-inch or less), the car will pull away from the wheel that is most forward. According to Jeffery, "This is the single most important, critical element-other than the setup on the torque arm. In certain instances, tolerances have been measured as high as 1 1/2 inches."  View Related Article

 

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