Cars with straight axles, have the entire axle assy move up/down with suspension height of car (diff free floating in axle). With irs (diff bolted to chassis) this isn't the case. Your centerpiece is prob upside down, like I said earlier. Thats the only way to angle the driveshaft
2011 Camaro - Gone
LSXOCET - Track toy being build. LSX power!
2008 BMW 135i - AutoX toy