REMOVAL & INSTALLATION
See Figures 1, 2, 3 and 4
The front lower control arm is a steel forging with 2 rubber bushings isolating the lower control arm from the front cradle assembly. The isolator bushings consist of a metal encased pivot bushing and a solid rubber tension strut bushing. The lower control arm is bolted to the cradle assembly using a pivot bolt through the center of the rubber pivot bushing an at the tension strut isolator bushing. The ball joint is built into the lower control arm and is non-serviceable. If the ball joint becomes worn, the entire lower control arm must be replaced. The ball joint seal, however, is replaceable as well as the lower control arm inner bushing. If the lower control arm is damaged, do not attempt to repair or straighten a broken or bent lower control arm.
- Raise and safely support the vehicle.
- Remove the front wheel(s).
- Remove the ball joint stud to steering knuckle clamp nut and bolt.
- Carefully insert a prybar between the lower control arm and the steering knuckle and separate ball joint from knuckle. Make sure ball joint seal does not get damaged during separation.
- Remove the tension strut-to-cradle attaching nut and washer from the end of the tension strut. When removing the nut, keep the strut from turning by holding the tension strut at the flats using an open end wrench. Discard the tension strut-to-cradle retainer nut. A new nut must be used during installation.
A new tension strut-to-cradle attaching nut must be used when installing the tension strut.
- Loosen and remove the lower control arm pivot bushing-to-cradle assembly pivot bolt.
- Separate the lower control arm and tension strut from the cradle as an assembly by first removing the pivot bushing from the cradle and then sliding tension strut out of isolator bushing. Inspect control arm and tension strut for distortion, check the rubber bushings for excessive wear or deterioration and replace these components, if necessary.
- Install the tension strut and isolator bushing into the cradle first, then install lower control arm pivot bushing into bracket on the cradle.
- Installing the lower control arm-to-cradle bracket attaching bolt. Do not tighten the bolt at this time.
- Install the washer and new nut on end of tension strut. Tighten the tension strut-to-cradle bracket retainer nut to 110 ft. lbs. (150 Nm), while holding the tension strut flat with an open end wrench.
- Inspect the ball joint seal and replace if damaged. Install the lower ball joint stud into the steering knuckle and install the clamp bolt and nut. Tighten the bolt to 40 ft. lbs. (55 Nm).
- Install the front wheel and lug nuts. Tighten the lug nuts, in sequence, to 95-100 ft. lbs. (129-135 Nm). Lower the vehicle so the suspension is supporting the weight of the vehicle.
- Tighten the lower control arm pivot bushing-to-cradle bracket attaching bolt to 90 ft. lbs. (123 Nm).
CONTROL ARM BUSHING REPLACEMENT
To replace the control arm pivot bushing, the control arm and tension strut assembly must be removed. The removal of the bushing requires the use of an arbor press.DISASSEMBLY
See Figure 5
- Raise and support the vehicle.
- Remove the lower control arm and tension strut as an assembly as specified earlier in this section.
- Separate the tension strut from the control arm.
- Position the control arm in an arbor press with the large end of the pivot bushing inside the receiver, to MB-990799 or equivalent, and the tool supporting the control arm as shown. Position the remover tool MB-6642-2 or equivalent on top of the bushing. Using the arbor press, press the control arm pivot bushing out of the control arm.
- Remove the pressed out bushing from the receiver tool MB-990799 or equivalent and discard.
See Figures 6 and 7
- Turn the control arm over in the arbor press, then position the arm so that it is supported by the receiver tool MB-990799 as shown.
- Position the new bushing into the control arm so it is square with the bushing hole. Position the installer tool 6644-1 or equivalent on top of the bushing, with the bushing setting in the recessed area of the installer tool. Press the bushing into the control arm.
- Press the control arm bushing into the control arm until the installer tool squarely bottoms against the surface of the control arm. When the installer tool squarely bottoms on the control arm, the bushin