Diagnostic/video 4 weeks ago VIDEO: TCM Service Share Tweet Print Email Underhood Service Staff Writers,administratorView bio Bio Recent Posts Popular Posts Early Bird Registration Extended For Women In Auto Care Leadership ConferenceTenneco Launches Extensive Business-Building 2017 Expert Plus Loyalty ProgramRislone Introduces Diesel Fuel System TreatmentKukui Corp. Forms Partnership With NAPAU.S. Diesel Car Market Regained Momentum In 2nd Half Of 2016 Timing Chain Wear: Why Oil Quality MattersU.S. Diesel Car Market Regained Momentum In 2nd Half Of 2016Finding The Cause Of Battery Drain In A Chevrolet ImpalaVIDEO: TCM ServiceVIDEO: The Worst Spark Plug Jobs (Part 1) 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.