[mr0077]

??? Are you sure you're not trying to put the left upper (or lower), or both arms on the right side and vice-versa? The upper ball joint should be behind the lower (with a line from upper to lower ball joints leaning back at the top) for proper caster, otherwise the suspension is unstable, somewhat like backing up on a regular car, let the wheel go and watch it go all theway to full lock in one direction or the other; it's trying to flip around to a stable condition, like Ernie's example of castor wheels on a chair. Tell us more...sumpin's not right.