Calibrating speedo for final drive change

konvikt21 · 02-15-2015, 07:49 PM

Have my LSD ordered and switching to 3.46 final drive from stock 3.08. Is there any option within INPA for correcting the speed limit?

hassmaschine · 02-21-2015, 08:35 AM

you don't need to. the speedometer runs off the ABS sensors, the diff ratio is inconsequential. Only older cars that run the speed sensor from the transmission (usually cable driven) would need an adjustment, which would be no BMW ever made that I know of.

02-15-2015, 07:49 PM	#1
konvikt21 Private First Class 17 Rep 170 Posts Drives: e93 335i Join Date: Jun 2014 Location: Ithaca Ny iTrader: (1)	Calibrating speedo for final drive change Have my LSD ordered and switching to 3.46 final drive from stock 3.08. Is there any option within INPA for correcting the speed limit?
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02-21-2015, 08:35 AM	#2
hassmaschine Major General 3973 Rep 7,215 Posts Drives: "NBO" 330i Join Date: Jun 2014 Location: earth iTrader: (0)	you don't need to. the speedometer runs off the ABS sensors, the diff ratio is inconsequential. Only older cars that run the speed sensor from the transmission (usually cable driven) would need an adjustment, which would be no BMW ever made that I know of.
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