When the M Line was split up in 1932, the segments on 48th and 54th Streets were spun off into their own service: the 9 car.

[2] The service was rerouted in 1934, with the outbound terminal remaining at 48th and Crenshaw and cars running to the Atchison, Topeka and Santa Fe Railway's La Grande Station on tracks used by the 7.

[3] The line was again rerouted in 1939 as the 48th Street segment of the old 9 was combined with portions of the former 2 and 10 cars.

At the intersection of Pasadena and Broadway, the line split into two branches: one to Montecito Drive and one to Mission Road.

The branch to Montecito Drive via Griffin Avenue was abandoned in April 1948.