Like the time I put 20% gasoline in my 300D. Mercedes mech says, "You're friggin nuts". I show him in the factory owners manual; the recommendation by MBZ to add gasoline to the diesel. And what did he say? Deer in headlights!~! I NEVER change my trans fluid. If your trans fluid needs changed, then your trans is toast. Nothing wrong with changing the filter, but if the fluid is nice, you can save $50. These ripoff shops that suck out the fluid thru the dipstick tube and just add new fluid are doing a disservice cuz they're leaving in the old filter and adding fresh high-detergent fluid that going to clean out all the nooks and crannies and clog the old filter. Guy just paid over $100 to have the f&f changed in his C6 cuz his fluid was BLACK...hahahhahaha. Folks bring their transs in with it and the converter all filled up with new fluid...another $50 I just made; cuz that chits goin into MY car! My brother is constantly changing the oil in his BMW; 100% SYNTHETIC!! I say, hey I might be able to find a use for that....Somebody stop me...
