Control Arm: Description and Operation
CONTROL ARMSThe upper control arm bolts on frame brackets. The frame brackets have slotted holes which allow the arms to be adjusted for caster and camber.
The lower control arms bolt to the lower frame brackets and pivots through bushings.
The control arms have lube for life ball studs. The control arm travel jounce) is limited through the use of rubber/urethane bumpers. Rebound travel is limited by the shock absorber.
Having the suspension at curb ride height when torquing bolts ensures good ride characteristics and longer bushing life by preventing excessive "wind-up" of the bushing.