Diagnostic/video 9 months ago VIDEO: TCM Service Share Tweet Print Email Underhood Service Staff Writers, View bio Bio Recent Posts Popular Posts OTC Releases Bravo 2.11 Diagnostics Software With Major Enhancements And Expanded CoverageMr. Gasket Releases Assortment Of New ProductsCheck Out The September Issue Of Underhood Service MagazineMAHLE Service Solutions Introduces FluidPRO ATX180Pico's Waveform Analysis, Search Feature Help To Validate Characteristics And Performance Of Complex Devices IMR Insight Report Shows Consumers Are Delaying Vehicle Routine MaintenanceMilwaukee Introduces Combination Wrench SetsMAHLE Service Solutions Offers TechPRO VDS Combo Kit For Light And Commercial Vehicle DiagnosticsRegistration Opens For MACS 2018 Training Event And Trade ShowChampion Laboratories Introduces New Line Of Synthetic Oil Filters 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.