6Post.com | BMW 6-Series Forum - View Single Post - Booming sound when shifting up in SPORT mode?

GreyCoupe · 08-29-2011, 06:40 PM

I have driven the new convertible less than 250 miles, so I do not suggest that I know what is going on, but I do know that these sophisticated new transmissions are controlled by chips that do a rev-match blip of the throttle on some shifts...any chance that's what you're hearing...?

08-29-2011, 06:40 PM	#5
GreyCoupe Second Lieutenant 6 Rep 253 Posts Drives: 15 650i Coupe Join Date: Feb 2011 Location: North Carolina iTrader: (0)	I have driven the new convertible less than 250 miles, so I do not suggest that I know what is going on, but I do know that these sophisticated new transmissions are controlled by chips that do a rev-match blip of the throttle on some shifts...any chance that's what you're hearing...? __________________ Enjoyed some fun cars over the years: 1966 Corvette Convertible, 240Z, E24 L6, 300CE-24, 2004 645 Ci, 550SL, A6s, 535xi, E300/Bluetec/420, Grand Cherokee Overland, 2012 650i Coupe, 12 CL550, 13 SL550, 15 650i Coupe
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