Video Transmission Tech: GM 6T40 Friction Plates Ever been confused about 6T40 friction plates? Let Mike Riley unravel some of the mystery. Advertisement ByTransmission Digest on February 19, 2020 In this video, Mike Riley discusses repair procedure tips when dealing with the friction plates on a GM 6T40, as well as discussing the history behind the different generations of these pieces.AdvertisementClick Here to Read MoreAdvertisement Advertisement In this article:Garage Studio, GM 6T40, Transtar Industries Inc. Loading Post... Loading Post... Loading Post... 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.