Dated 10.2.74

Northern General Transport service 138 Ryton-Winlaton-Swalwell-Whickham-Lobley Hill-Newcastle. Renumbered 638 The terminus at Ryton changed to Ryton Village then via Ryton Church and the old 138 route to Lobley Hill Road, Saltwell Road and the old 166 route to Wrekenton then Springwell to Washington.

Service 139 was changed to 639.

The 638 was extended from Washington to Sunderland on 14th August 1976.