GM Allison-equipped 4×4 pick-ups in offroad and drag racing situations. Even a normal amount of driveline vibration can cause the housing to fail, resulting in a transmission fluid leak or worse, internal transmission and transfer case damage. Once the housing cracks, repairing it requires removal of the transmission and transfer case. PPE’s new Transmission Transfer Case Brace helps support the overhanging, heavy transfer case by spreading the load up and across the adaptor housing to the center section of the transmission.