The 600 volts was also trainlined through the whole train by the use of high voltage jumper cables, which had to be run between cars.

On earlier IRT equipment, the braking notches were different for a motorman, depending on whether or not he was operating electrically or pneumatically.

In 1921, all low voltage cars, including the Flivvers and Steinways - were equipped with MUDC or multiple-unit door operation.

In 1952, with the shuffling of equipment to save on crews, the few Low-Vs on the Broadway Express were no longer needed for that service.

In late 1958 through early 1959, several Low-Vs, following the Flivvers and regular Steinways, appeared on the two West Side Locals, Broadway and Lenox Ave., to replace the last of the High-Vs still in service.

From August 1959 through December 1960, roughly 25 cars that had been modified for operation on the BMT Culver and Franklin Ave.

Shuttle, by adding extensions on their sides at floor level to fill in the wider platform gaps on the B Division; this lasted only for a year and a half, after which the cars were returned to the IRT.

[3][4] After 47 years of service, most of the Low-V cars were retired in 1963, spending their last days on the Lexington–Jerome Ave. Express line.

A handful number of trailer cars remained on the fragment of IRT Third Avenue Line in the Bronx to finish out their years until November 3, 1969.