GM Canada to Start Corvette 8-Speed Dual-Clutch Transmission Production In Q2 2022


GM Canada to Start Corvette 8-Speed Dual-Clutch Transmission Production In Q2 2022

Photo Credit: Tremec

Production on the eight-speed DCT transmission for the C8 Corvette is slated to begin in the second quarter of 2022 at a General Motors factory in Ontario, Canada.

Sources have told GM Authority that the St. Catharines plant – which first opened in Ontario in 1954 – will begin making the transmissions for the Corvette Stingray and the new 2023 Z06 next year.

We told you back in November 2020 that the St. Catharines plant would be building the transmissions as part of a three-year labor deal worth more than $1 billion that had just been overwhelmingly approved by Canadian autoworkers. The facility also produces the GF6 six-speed automatic transmission.

That deal included more than $109 million to in-source new transmission work at the St. Catharines Propulsion Plant for the C8 Corvette, Jerry Dias, president of Unifor National, the union that represents the workers, said then.

2020 Corvette Stingray Transmission

Photo Credit: Keith Cornett

GM Authority claims that GM will be taking over production of the DCT transmission from current manufacturer Tremec that is based in Wixom, Michigan, and has production facilities in Mexico and Belgium. We are trying to confirm that from our own sources as our reading of the Unifor agreement was that the Canada operations would “support the manufacture of a new transmission and variants supplementing an existing supply arrangement for vehicles in a critical market segment.

We always believed that new transmission would be slated for the C8 Z06 which has different internals and programming vs the C8 Stingray’s transmission while the St.Catherines facility would also be supplementing Tremec’s Wixom plant for sourcing additional Stingray transmissions.

It’s also no surprise that production of the transmissions would begin early in the 2nd Quarter next year as that is also when the Z06 is expected with GM telling dealers the start of 2023 model year production would begin on May 9th. We’ll let you know any additional details we are able to find out.


C8 Corvette Transmissions Part of GM’s New Labor Deal With Canadian Autoworkers
GM Has Notified the NHTSA Over C8 Corvette Transmission Investigation
[VIDEO] The Corvette Mechanic Paul Koerner Does a Virtual Tour of the 2020 Corvette’s 8-Speed DCT Gearbox



  1. What is the good news ? The second most expensive part of the Vette is made out side th USA North America is not the same.

  2. Bill — Canada is the second biggest market for C8 Corvettes, so why shouldn’t the second most expensive part be made here? Besides, St. Catherines is only barely outside the USA.

  3. Doug
    Because US auto workers are suffering enough we should be building America’s sports car here. When the Cruise was stopped they were led to believe the Blazer would be built here instead it went south of the border. Why are we exporting a product that we do not have enough of to sell here?

  4. Bill — so not only do you not want any C8 Corvette parts made in Canada, you also do not want anyone in Canada to be able to buy a new C8 Corvette, at least not until everyone in the USA who wants one (and can afford one) has bought one? That doesn’t sound very neighbourly!

  5. Relax, folks. This may help reduce costs by allowing more GM-organic support. Anyways, better Canada than, like, say, China.

    On a side note, finally 3000 here!

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