Diagnostic/video 4 months ago VIDEO: TCM Service Share Tweet Print Email Underhood Service Staff Writers, View bio Bio Recent Posts Popular Posts Mitchell 1 Enhancements To ProDemand Streamline User Experience And Search ResultsWomen In Auto Care Unveils New WebsiteVIDEO: How Do Plastic Carrier Gaskets Work?Big Ass Solutions Unveils Prototype Of Automated Personal FanSmoke Out OBD II EVAP Codes With Vacutec's EVAPro Intake Manifold Failures On Modern Mercedes-Benz ModelsVIDEO: Slow Or Lazy Oxygen Sensor MaintenanceVIDEO: Carbon Or Charcoal Activated Cabin Air FiltersVIDEO: Diagnosing Head Gasket LeaksOil And Filter Service Guidelines 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.