Video Transmission Tech: TEHCM In this Transmission Tech, learn what separates the 6T40 computer unit from most other transmissions. Advertisement ByTransmission Digest on March 6, 2020 In this episode of Transmission Tech, Mike Riley discusses computer controlled transmissions (CCT), and more specifically that found in the GM 6T40.AdvertisementClick Here to Read MoreAdvertisement Advertisement In this article:6T40, CCT, Garage Studio, TEHCM Video: CVT Operation – Part II Video: Transmission Repair Shop History and Current Trends Video: Toyota U660E Video: CVT Operation – Part I Advertisement WEBINARS Watch a webinar for free on-demand! E-MAGAZINE Read the most recent edition of Transmission Digest. SUBSCRIBE Stay up to date by signing up for Transmission Digest newsletters.