From that point the class was assigned to shorter commuter trains and deadhead rolling stock between Grand Central Terminal and Mott Haven coach yard.

After a disastrous 1902 accident in the Park Avenue Tunnel the New York legislature passed a law banning steam locomotives within the city limits effective in 1908.

The electrification project would see not only the construction of the Grand Central Terminal itself, but miles of completely underground platforms and yard tracks which would not have been possible with exhaust-producing steam locomotives.

It was capable of rapid acceleration and deceleration, ideal for the Hudson and Harlem lines’ numerous, closely spaced commuter rail stations.

Unfortunately, two days into the new electric service in 1907 a train led by two T-2 class locomotives number 3407 and 3421 derailed on a curve on the Harlem Line killing 24 and injuring 140.

For the next 60 years the S-motors were assigned to short local commuter trains and empty equipment movements between Grand Central and the Coach Yards at Mott Haven.