On September 5, 1976, the Route 23 trolleys were moved from Germantown Depot to Luzerne Depot, making Luzerne the operating depot for the six remaining North Philadelphia streetcar routes: 6, 23, 50, 53, 56, and 60. A pamphlet was issued by SEPTA informing the Route 23 operators of this change. After the move, the route's PCC all-electric cars were replaced with pre-war PCC "air cars", which incorporated the use of pressurized air to power certain aspects of the car (such as sanders for traction) in order to provide greater reliability on Germantown Avenue's hills.