there is something wrong with that spec sheet. auburn only makes a cup/cone type limited slip. its a metal to metal type of clutch. also i dont think auburn makes a 33 spline lsd. there have been some company's that have modified lsds to different splines from the original offerings but not very common. 33 spline axles used to be a popular size axle for an aftermarket up grade on the ford 9". now days people goto 35 spline axles. it costs the same but is stronger.