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#11
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2012 xDrive35d 2001 BMW X5 3.0i 5MT and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80 Block Tester |
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#12
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Have you thought this through?
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02 BMW 5 Speed Supercharged Ethanol Burnin Meth Injected E53 |
#13
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I don't know where the sensor would be on manual shift, I would guess differential or transfer case
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#14
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I just found this from a factory training document I had on the E53/M54 from when the X5 first came out: "Road speed is input to the ECM for cruise control as well as DSC regulation. The vehicle speed signal for normal engine operation is supplied from the DSC module (right rear wheel speed sensor). The road speed signal for cruise control is supplied from the DSC module. This is an average taken from both front wheel speed sensors, supplied via the CAN bus." This document wasn't specific to the manual transmission vehicles, but I'm surprised they would handle something as basic as speed input in different ways auto vs. manual. In fact, I bet the speed sensor on your automatic is only used for trans diagnostics (i.e. monitor input shaft speed vs. output shaft speed to detect slippage).
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2012 xDrive35d 2001 BMW X5 3.0i 5MT and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80 Block Tester |
#15
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Are the diffs open on a 4.6iS?
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02 BMW 5 Speed Supercharged Ethanol Burnin Meth Injected E53 |
#16
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Yes, changing both.
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas |
#17
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Yes, front & rear diffs are open on all e53.
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2012 xDrive35d 2001 BMW X5 3.0i 5MT and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80 Block Tester |
#18
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The 4.6 front to rear is permanent with 38% of power going to the front wheels and 62% to the rear. The diffs are 'open' from the standpoint that if a tire loses traction the ABS or DSC will adjust accordingly.
In the 'old days' diffs when there was no ABS or DSC, diffs could be open which meant all power went to one rear wheel all the time. Positraction corrected that issue with power to both rear wheels. Positraction would allow different wheel speeds such as is needed when going around a corner or curve. Racers often welded the diff so that the both rear tires were always getting the power. Locked diffs issue was they turned at the same rate all the time which was really not a good idea for a daily driver.
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas |
#19
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The limited slip was good enough on my z28 that it would spin the inside wheel when taking tight turns if there was sand on the ground. Took a while to figure out the weird noise
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#20
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The thing that would concern me most is the transmission.
You have a 2002, so if your transfer case is the same as mine you should be good there as long as both diffs are installed. The automatic transmission has programming for shifting. If the ratios are changed, what effect will that have on the trans? Also, if the trans does accept the swap, but changes the shifting due to rpm increase, what effect would that have on a trans that has performed a certain way for its entire life? You also stated, for improved 0-60. So I am assuming that at times the truck will be under full throttle, will the drive line be able to handle the changes to the original formula?
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02 BMW 5 Speed Supercharged Ethanol Burnin Meth Injected E53 |
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