Первые вагоны PCC в Торонто: от PC 1 до A 8

The first PCC acquisitions, classes A 1 to A 8, were for new PCCs, with each class representing a separate order to the manufacturer. PCCs ordered new by the TTC were built in Montreal, Quebec by Canadian Car and Foundry under license from the St. Louis Car Company of St. Louis, Missouri. The car body shells and trucks were fabricated by St. Louis Car Company, and shipped to Canadian Car and Foundry, who then installed the components and completed the cars. Initially, the first 3 PCC classes were numbered PC 1, PC 2 and PC 3. However, by 1944, they would be renamed to A 1, A 2 and A 3. The first order for PCCs (class PC 1, later renamed as A 1) was placed in March 1938 for 140 air electric cars. At this time, this was the largest PCC order placed to date in North America, although it would be surpassed by a later order from Chicago. They replaced 27 wooden former TRC cars and 30 3 door class Q "Harvey" trailers. The new PCCs first went into service on 23 September 1938 along the St. Clair streetcar line (today's 512 St. Clair). In the fall of 1940, the TTC ordered 50 class PC 2 (later A 2) cars. The PC 2 cars went into service on 24 September 1940 along the King streetcar line (today 504 King). The TTC retired 30 more former TRC cars and another 30 Harvey trailers. By March 1942, the TTC received its third PCC order (class PC 3, later A 3) of 60 cars. This class had technological improvements over the first two classes such as super resilient wheels. In March 1942, the TTC wanted to order 60 more PCCs. However, due to war time rationing, it received only 15, arriving in January and February 1944. These class A 4 cars were assigned to the St. Clair Carhouse, and boosted service on existing lines. The final 25 air electric PCCs that the TTC ordered (class A 5) arrived in 1945. Because of war time shortages, both class A 4 and A 5 cars had lower quality components for passenger fixtures, that were replaced after the war. The A 5 cars permitted the replacement of Peter Witt streetcars on the Dupont streetcar line. The next three PCC orders came after the war, and were for all electric PCCs. The TTC wanted to retire its 195 remaining wooden former TRC cars built between 1911 and 1917. The TTC ordered its first 100 all electric PCC cars in May 1946. These A 6 cars arrived from December 1947 to the spring of 1948. The new cars were assigned to the Bloor and Carlton (today 506 Carlton) routes displacing their air electric cars to other routes. The next order (to become the A 7 class) were for 100 multiple unit PCCs to be assigned to the busy Bloor streetcar line. These cars would later be supplemented by second hand cars from Cleveland (classes A 11 and A 12) fitted with couplers. The final order the TTC made for new PCC cars was delivered in 1951. There were only 50 cars purchased for class A 8 because by this time new PCCs were much more expensive to buy. The A 8 class was the third last order for new PCCs in North America, with only orders from Boston and San Francisco remaining to be completed. The arrival of the A 8 class provided enough streetcars to retire the last of the wooden, class BB streetcars that the TTC inherited from the Toronto Railway Company in 1921.

In 1951, the TTC still had 348 Peter Witt cars and 105 trailers. Since the Yonge streetcar line used only 70 Peter Witt trailer trains, the opening of the Yonge subway (part of today's Line 1 Yonge–University) in 1954 would in itself not allow the retirement of the remaining Peter Witt fleet. The TTC wished to avoid the high cost of buying new PCCs; thus, it had started to search for second hand PCCs from U. S. transit operators closing out streetcar operations. In 1950, the TTC acquired 50 all electric PCCs (class A 9) and 27 older air electrics (class A 10) from the Cincinnati Street Railway. Both sets of former Cincinnati cars were built by the St. Louis Car Company. In Cincinnati, these cars all had two trolley poles like for a trolley bus. The TTC removed one of the two poles. In 1952, the TTC purchased 75 all electric PCCs from the Cleveland Transit System. Fifty were built by Pullman Standard becoming class A 11 (dubbed "Cleveland"), and twenty five by the St. Louis Car Company becoming class A 12 ("Louisville"). Each class had roof housing for fan equipment, a feature which the TTC chose to disable. The housing gave the cars a distinctive appearance, with each class having a distinctively different style of housing. The A 12 former Louisville cars were built for the Louisville Railway Company but were never put into service there. The cars were sold to the Cleveland Transit System as deliveries to Louisville were being made, the last 10 of the 25 "Louisville" cars being shipped directly to Cleveland. Also in 1952, the TTC purchased 48 all electric PCCs from the Birmingham Electric Company. These class A 13 ("Birmingham") cars were built by Pullman Standard. In Birmingham, Alabama, these PCCs had the notoriety of having racially segregated seating, a practice that ceased with their shipment to Toronto. In 1957, the TTC purchased 30 all electric PCCs from the Kansas City Public Service Company, and became class A 14 ("Kansas City"). These are the only all electric PCCs not to have standee windows as the president of Kansas City Public Service wanted "none of those little apertures". The A 14 cars supported only one piece front rollsigns. Because of this, the A 14 cars would show only destinations for the St. Clair and Earlscourt routes (today 512 St. Clair) effectively confining the A 14 cars to the St. Clair streetcar line. The "Kansas City" PCCs became the TTC's final purchase of second hand PCC streetcars. At this time, only Mexico City had more second hand PCCs. The TTC had to modify all its second hand PCCs to its standards. The work included:
Regauging to TTC gauge. Adding Necessary Action circuits (an exclusively Toronto feature) to activate track switches. Removing or sealing (A 14) backup controls. Removing one of the two poles from the former Cincinnati cars (A 9 & A 10). Adding treadle operation to A 9, A 11, A 12 and A 13 cars. Modifying doors to fold outward, if not so configured. Adding the green advance light on the roof above the front rollsigns. Removing ventilation fans from A 11 and A 12 cars. Adding two couplers each to A 11 and A 12 cars. By 1958, there were still 132 Peter Witt streetcars in service despite the presence of 744 PCC streetcars. The opening of the University subway extension (part of today's Line 1 Yonge–University) in 1963, and the closure of the Oakwood and Dupont streetcar lines ended Peter Witt operation, making the Toronto streetcar fleet 100% PCC.

In the late 1980s, as CLRVs (Canadian Light Rail Vehicle) were replacing the aging PCC fleet, the TTC started to create a new class of PCC cars, the A 15 class, by rebuilding A 8 class cars for use on the then new Harbourfront streetcar line (part of today's 509 Harbourfront route). The refurbishment program was cancelled in 1991 following an edict by the Metropolitan Toronto government that all future vehicle purchases must be accessible; all 19 PCCs were rebuilt, with the last car outshopped in 1992. However, in 1995, the A 15 class PCCs were retired because the new CLRV fleet could handle the ridership, which had declined by that time. About 1974, the TTC converted two class A 11 PCCs (4631 and 4668) into a streetcar system rail grinder train (renumbering the cars as W 30 and W 31). W 31 had its brake shoes replaced by rail grinding blocks. W 30 pulled the train and provided braking power. The train's last rail grinding job was in 1999; in 2002, the two cars were donated to the Halton County Radial Railway.