In May 1937 the Grand Trunk renamed the westbound Maple Leaf the La Salle.

[1]: 191 Beginning in 1961, the Maple Leaf went via the more populous cities of Kitchener and Guelph, whereas it had previously taken a route via Brantford and Hamilton for the trip between London and Toronto.

[4] By October 1963 the similar itinerary train, the Inter-City Limited had followed suit for its westbound trip.

[1] : 191  After the truncation of the International Limited to Port Huron on June 23, 1970, the Maple Leaf was the Grand Trunk train on the Chicago–Toronto route.

Service over the Grand Trunk resumed on September 15, 1974, with the introduction of the Blue Water Limited.