Mopar 55398404AA Front Upper Control Arm

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This procedure is for models with independent front suspension. To remove the control arm, start by loosening the wheel lug nuts and raising the vehicle on jackstands. Remove the wheel and then loosen the nut on the upper balljoint stud. Use a balljoint removal tool to disconnect the balljoint from the steering knuckle. If you don't have the proper tool, a picklefork type balljoint separator can be used, but it may damage the balljoint boot. If necessary, remove the brake disc for clearance. Detach the wiring harness from the control arm. Remove the nuts and pivot bolts that attach the control arm to the frame. Pull the upper arm from its frame brackets. To install the control arm, reverse the removal steps. Tighten all fasteners, but don't tighten the pivot bolt nuts until the vehicle is at normal ride height. If needed, simulate normal ride height by raising the outer end of the lower control arm with a floor jack. Install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts. Finally, have the front end alignment checked and adjusted if necessary.

For 2WD models, start by loosening the wheel lug nuts and raising the vehicle. Support it securely on jackstands placed under the frame rails. Remove the wheel and support the outer end of the lower control arm with a floor jack. Remove the shock absorber. Next, remove the brake caliper, caliper bracket, and disc. Install a suitable internal type spring compressor and compress the spring sufficiently to relieve all force from the upper spring seat. Loosen the nut on the lower balljoint stud and disconnect the balljoint from the steering knuckle. Disconnect the link from the stabilizer bar. Lift the knuckle and hub assembly up and place a block of wood between the upper control arm and the frame to support the assembly out of the way. Pull the lower control arm down and guide the compressed coil spring out. Mark the positions of the eccentric washers and remove the bolts that attach the control arm to the frame. Pull the lower control arm down and guide the compressed coil spring out. Mark the positions of the eccentric washers and remove the bolts that attach the control arm to the frame. Pull the lower arm from its frame brackets.

For 2WD models, start by loosening the wheel lug nuts and raising the vehicle. Support it securely on jackstands placed under the frame rails. Remove the wheel and support the outer end of the lower control arm with a floor jack. Remove the shock absorber. Next, remove the brake caliper, caliper bracket, and disc. Install a suitable internal type spring compressor and compress the spring sufficiently to relieve all force from the upper spring seat. Loosen the nut on the lower balljoint stud and disconnect the balljoint from the steering knuckle. Disconnect the link from the stabilizer bar. Lift the knuckle and hub assembly up and place a block of wood between the upper control arm and the frame to support the assembly out of the way. Pull the lower control arm down and guide the compressed coil spring out. Mark the positions of the eccentric washers and remove the bolts that attach the control arm to the frame. Pull the lower control arm down and guide the compressed coil spring out. Mark the positions of the eccentric washers and remove the bolts that attach the control arm to the frame. Pull the lower arm from its frame brackets.

To install the control arm, reverse the removal steps. Tighten all fasteners, but don't tighten the pivot bolt nuts until the vehicle is at normal ride height. If needed, simulate normal ride height by raising the outer end of the lower control arm with a floor jack. Install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts. Finally, have the front end alignment checked and adjusted if necessary.