Install the rear suspension jounce bumper (1) and tighten until the jounce bumper just makes contact with the mounting bracket.
Using a grease pencil or equivalent, create a reference mark (1) from the jounce bumper (3) to the mounting bracket (2).
Tighten the jounce bumper (3) by rotating it 360° or one full turn.
Using the reference mark (1) as a starting point, rotate the jounce bumper (2) an additional 120° or two points of the hex nut (3) on the jounce bumper.