Diagnostic/video 3 months ago VIDEO: TCM Service Share Tweet Print Email Underhood Service Staff Writers, View bio Bio Recent Posts Popular Posts ProMAXX Tool Offers The Rocky TEC Kit To Assist With Exhaust Manifold RepairFree Auto Care Careers Recruitment Guide For Hiring ManagersKIA: Codes P0171, P0446, P0507 and P2187Ford Announces New Motorcraft Super Duty Diesel Motor OilWIX Filters Renews Sponsorship Of Performance Racing Network's 'At The Track' VIDEO: Three Tips To Replace Exhaust Manifold GasketsDodge Ram TSB: Short Runner Valve Control Performance Codes P1004, P2016 Or P2017VIDEO: Three Tips To Extend Fuel Pump Service LifeVIDEO: Fuel Pump Replacement On GDI EnginesVW Beetle, Golf And Jetta: Broken Tensioner, Root Cause Of Failure Is Alternator Pulley 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.