12. If the tires were removed, reinstall them and lower the car back to the ground. The car must be properly resting on its suspension before tightening down the fasteners that secure the panhard bar. After the car is resting on its wheels, it’salso a good idea to try and bounce the rear of the car up and down by hand a few times to help settle the suspension. Then tighten all three of the bolts you worked with earlier. They should be two panhard bolts, and the panhard support brace bolt. You’ll want to tighten them back to 129 ft/lbs. of torque. If you need to raise the vehicle back up to gain some clearance, you should raise the rear of the vehicle up by the axle, and support it with jack stands under the axle. This will keep the rear suspension loaded properly during the tightening process.
13. Now that the panhard bar has been installed, it’s time to adjust it. The jam nuts should not be tightened down yet, and so you should be able to crawl under the car and twist the panhard bar to adjust your Mustang’s body over the axle. It will take very little effort, and can be accomplished by hand. Ultimately, you want to center the body perfectly over the axle. To check to ensure the body of the car is properly centered, you’ll need to measure each side after you turn the panhard bar a few rounds. Since the middle of my sidewalls of my tires will poke out from the quarter panel just slightly when I’m finished, I found something to make a straight edge, made sure it rested properly on the tire’s sidewall at the top and bottom, and then used a tape measure to check each side. For narrower wheels and tires, you can simply tape a string and weight (to make a plumb-bob) as a reference point to measure from.