I have been told by a few people that if i Swap the diff on my 540 to a different gear ratio i wont have to reprogram my speedometer because it uses the ABS sensor to sense speed, is this true? i remain spectical.
That is true.
I'm spectical too. Extra spectical.
2003 M3CicM6 TiAg
2002 540iT Sport Vortech S/C 6MT LSD TiAg
2008 Audi A3 2.0T DSG (the daily beater)
2014 BMW X1 xDrive28i (wifemobile)
Former:
1985 MB Euro graymarket 300SL
1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)
It's skeptacular!
Diehard E39 driver.
I'd rather die or take a walk before driving an E60 or any BMW made after Y2K.
"Your momma's so ugly she makes Bangle cars look nice"
This isn't entirely true. If you go with a 3.15 ratio for example, you will lose cruise control at certain speeds unless you load one of TerraPhantm's modified DME tunes for 540i/6 that fix it. The speed info does come from ABS sensors, but engine speed vs wheel speed does change and the range set in the DME doesn't fit within what it is expecting for cruise control. On auto cars, you could get a 3.15 stock from BMW, so they don't have the issue, but no 540i/6 came with a 3.15 from the factory. If you choose a different ratio than 3.15, you might need to get in touch with TerraPhantm directly to see if he can make you a custom DME tune that will work with the ratio you pick.
-Paul
2003 "M5" - Full M5 conversion, AMG C63S 6 piston front calipers, Porsche Panamera 4 piston rear calipers, GC Coilovers, Eibach ARBs, UUC Evo3/DSSR, Borla Exhaust w/Muffler Delete, BMW NBT with Carplay/Android Auto, Bi-Xenons, e38 Style 37 M-Pars, e60 Hubs 530i 6-speed swap build thread2005 Range Rover 4.6is (M62TU Powered) - 4.6is Engine Swap from X5, BMW NBT with Carplay/Android Auto
2006 Porsche Cayman S - Soul Performance Competition Headers and Exhaust, H&R Coilovers, 718 Boxster Spyder wheels, Rennline 35mm rear spacers
I got tired of assplain that over and over... thanks for mentioning
2003 M3CicM6 TiAg
2002 540iT Sport Vortech S/C 6MT LSD TiAg
2008 Audi A3 2.0T DSG (the daily beater)
2014 BMW X1 xDrive28i (wifemobile)
Former:
1985 MB Euro graymarket 300SL
1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)
-Paul
2003 "M5" - Full M5 conversion, AMG C63S 6 piston front calipers, Porsche Panamera 4 piston rear calipers, GC Coilovers, Eibach ARBs, UUC Evo3/DSSR, Borla Exhaust w/Muffler Delete, BMW NBT with Carplay/Android Auto, Bi-Xenons, e38 Style 37 M-Pars, e60 Hubs 530i 6-speed swap build thread2005 Range Rover 4.6is (M62TU Powered) - 4.6is Engine Swap from X5, BMW NBT with Carplay/Android Auto
2006 Porsche Cayman S - Soul Performance Competition Headers and Exhaust, H&R Coilovers, 718 Boxster Spyder wheels, Rennline 35mm rear spacers
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