By August 1950, conversion of the shuttles had been completed. Two units entered passenger service in October, with the final one following in February 1951. Central Line services had been extended from Loughton to Epping on 25 September 1949, and the converted trains were primarily used to provide a shuttle service on this section, although they were sometimes used on the Woodford to Hainault section, which had opened on 21 November 1948. The three trains were moved back to the Piccadilly Line on 17 May 1954, for use on the shuttle service from Holborn to Aldwych. Car 11010 overran Aldwych station on 3 April 1955, and was damaged when it hit the buffer stops. The cab was rebuilt at Acton Works, and the finished result looked more like the 1938 Stock than the remaining 1935 Stock cars. Two trains returned to the Central Line for the opening of the Epping to service on 18 November 1957, where they were assisted by a three-car unit of 1938 Stock, specially adapted by fitting two compressors to the trailer car.