Found this article for you. Hope this helps
The ball joint is integrated into the lower control arm and cannot be replaced separately.
In many ways, that makes this project a lot less complicated (especially compared to the Taurus / Sable ;))
Before getting started, be sure to get an illustration of the front suspension - the linked Autozone Repair Guide is a good source. Describing the scene & cast of parts:
- The control arm connects to the frame with 1 large bolt/nut through a bushing on one end.
- The other end has the ball joint stud sticking up that connects to the bottom end of the steering knuckle.
- There's one more part involved: lower arm strut.
- ** 1996-1998: This 'bar' connects to the middle of the control arm, and angles back and connects to the frame on the other.
- 1999-2003: the end of the strut connects to the 'extension' coming off the control arm.
Preliminaries: jack the car up, use a jack stand, chock the wheels, take the front wheel off - leave the key in the ignition so the steering wheel is unlocked.
- Remove the lower arm strut nut and dished washer from the end that goes through the middle of the control arm.
NOTE: take notice of which way the dishing of the washer is pointing - you'll want to remember that for reassembly.
- Remove the 'pinch' bolt from the bottom of the steering knuckle that holds the ball joint stud in place - punch it all the way out of the knuckle.
- To make separating the control arm from the knuckle easier, you can use a small pry bar, or other handy tool to open up the 'pinch' point around the ball joint stud.
- I use a good length of 2x2 to leverage the control arm down - separating the ball joint stud from the knuckle.
- Last step - remove the control arm-to-frame bolt - and wiggle control arm off the end of the arm strut.
- Sit back and have a cup of coffee - 1/2 way there...
- Put the end of the arm strut through the the control arm connecting point (middle for or control arm extension - model year dependent)
- Reattach control arm to frame - torque bolt to 85-97 ft lbs
- Ball joint stud to steering knuckle -
* A second pair of hands really come in handy for this part
* Line up the stud to the same angle as the opening in the bottom of the steering knuckle
* I usually reach for the 2x2 to lever the control arm down far enough to get the stud lined-up and back into the steering knuckle
- Insert ball joint pinch bolt -
NOTE: Don't start hammering the bolt back through the hole! There's a groove in the ball joint stud that must be lined up in the bolt hole - may have to tap the control arm up / down to get it "just right". Bolt slides in a whole lot easier then.
Torque bolt to 46-52 ft lbs
- Reinstall strut washer & nut - this is where you were supposed to remember which way the washer 'dishing' was pointing!
Torque to 85-97 ft lbs
Don't forget to put the wheel back on, and drop the van back to the ground. Now
is the time for the beer...
Price references: Autozone, 1996-1998 $60, 1999-2003 $102