Diagnostic/video 2 months ago VIDEO: TCM Service Share Tweet Print Email Underhood Service Staff Writers, View bio Bio Recent Posts Popular Posts Injectronic Announces Latest Addition To The CJ Family Of Automotive Diagnostic Scan ToolsU.S. Automotive Aftermarket Industry Swayed By Lower Retail Pricing, Weather Patterns In 2016, Reports NPD GroupASA Gears Up For Connected CARSCheck Out The February Issue Of Underhood Service MagazineVIDEO: Three Tips To Replace Exhaust Manifold Gaskets VIDEO: Understanding Modern Engine Intake, Water Pump And Thermostat GasketsVIDEO: Five Tips To Diagnose Belt NoiseLaunch Tech USA Introduces X431 Pro Professional Scan ToolReelcraft Offers High Operating Temperature Hose ReelsCheck Out The January Issue Of Underhood Service Magazine 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.