07-17-2017, 04:27 PM | #4 |
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2011 550i
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07-17-2017, 04:30 PM | #5 | |
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07-17-2017, 04:47 PM | #6 | ||
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"The F10 M5s manual and twin-clutch transmissions are both axed in favor of a smoother, more optimally geared ZF 8HP75 torque-converter transmission that is shared by both the F90 M5 and the M550i. Its largely unmodified from one to the other, with each sharing the same eight transmission ratios while the F90 M5 gets a shorter axle ratio (3.15:1 versus 2.81:1 in the M550i). The M5s converter locks up after about 3 feet of travel and stays locked. This, along with more rigid mounting of the various powertrain elements, results in greater drivetrain stiffness in the M5. The 7-plus percent shorter overall gearing contributes a bit to the F90 M5s generally more eager acceleration feel."
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Last edited by RPiM5; 07-17-2017 at 04:53 PM.. |
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07-17-2017, 05:09 PM | #7 | |
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07-19-2017, 11:08 AM | #8 | |
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More gears would have made sense in an E60 M5 where it had a relatively narrow power band, but in a car with a broad torque band like the F10 or F90 it seems like a waste, almost detrimental. |
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