Diagnostic/video 7 months ago VIDEO: TCM Service Share Tweet Print Email Underhood Service Staff Writers, View bio Bio Recent Posts Popular Posts Renegade Introduces Model TMB 2614 Top Load Turntable Automatic Parts WasherChampion Brands To Launch Modern Muscle Motor OilsAAPEX Technology Intersection To Provide View Of The FutureGM: Exhaust Smell in Cabin: Codes P0299 and P2263Power Steering: To Flush or Not to Flush Cooling Fan Assemblies Save Time And Simplify RepairsASA Announces 'Magical' Destination For 2018 Annual MeetingOnStar: Redefining The Diagnostic And Claims ProcessesQuaker State And The Onion Introduce 'The Interns' With New Satirical Video Series'The Group' Updates Website To Showcase Vendor Partners Andrew Markel debunks the myth that the TCM learns how the customer drives the vehicle. steve woody also note that the radiator cap plays a role in the transmission fluid. A bad cap will push fluid out the coolant system when the engine is hot. The coolant system on todays cars is very critical to cooling the engine and transmission fluids. When having a bad cap on the radiator, it pushes the coolant out the system. Sometimes causing blown head gaskets, cracked heads, boiling transmission fluid and making it gritty. When that happens the spools in the trans. valve get stuck and makes it hard to shift. Driving it to long like that, will burn up a transmission…… years of experience…. I’ve seen this so much. That I preach about the cap to all my customers.. Steve Woody/ Owner of Mobile Master Mechanic in South Carolina. GOD BLESS AND MERRY CHRISTMAS.