Nah I can't remember the part number, mine is the most aggressive one of the 2 kits.
It clunked when I first got it installed, it doesn't do it anymore more now. But it's mega tight, it has never single leged since I got it installed.
There's no way it can, 2WD mode, clutch kicking 3rds and it just bakes doubles all day long...... On semi's too!!