An article i found about the chimes at transit toronto ....
FINAL DAYS AND RETIREMENT
By 1993 the TTC had placed its order for new T-1 subway cars with Bombardier. With the M-1 cars slated for retirement, it was decided not to retrofit these cars with the new automatic door-chime system. As a result, the M-1 trains continued to use the traditional two-whistle system to indicate that the doors were closing. But as the M-1 series cars had been used for peak service only for most of the 1980s and early 1990s, they were in remarkably good condition, compared to the H-1 workhorses. As a result, when the new T-1s were delivered starting in 1996 and started service on the Yonge-University-Spadina line, it was the H-1s operating on that line that were withdrawn first. The Montreal series cars only started to be retired in October 1998 when the new T-1s started to displace H-2 series cars onto the Bloor-Danforth subway.
Realizing the Montrealers would not be in operation for much longer, the Toronto Transportation Society organized a retirement charter held on February 28, 1999. The last M-1 series train operated on May 3, 1999 and remained at Greenwood for several weeks before being loaned out to a film shoot, dressed up as a New York subway train.
The withdrawn M-1 series cars were stored at the then-inactive Davisville Yard and, over time, were picked up and removed by the scrap dealers. The last M-1 series car on TTC property, 5307, was hauled away in September 1999. All but the first two cars of the series, 5300 and 5301, were scrapped. No cars were considered as additions to the TTC’s work car fleet as there were plenty of H-1 class cars available.