A second clutch which couples a carrier of the compound planetary gear set to a speed ring gear of the single planetary gear set is arranged between the single planetary gear set and the compound planetary gear set. The signal ports may be power or data communications ports. A utility trough extends horizontally adjacent the horizontal upper edge, and the utility trough defines a utilities passageway having an upwardly facing elongated opening extending along substantially the entire length of the utility trough and providing access to the utilities passageway.