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June 13 2021 15:02:03
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e46 M3 coupe press photos
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SMG for M3

Sequential M Gearbox (SMG) for M3

The SMG II combines the six-speed manual gearbox (S6S420G) of the E46 M3 with computer-controlled electrohydraulic clutch and gear change operation. The driver is provided with the accuracy of manual gear selection, the convenience of automated shifting and the speed and adaptability of driver-adjusted computer control.

Using technology developed for the BMW/Williams Formula 1 car, the SMG II with DRIVELOGIC adapts the speed, accuracy and control of the race cars electrohydraulic shifting to the M3.

Features of the SMG II include:

  • Two operating modes
  • -Manual, shift lever or the steering wheel mounted paddle switches are used to make gear changes. (S-Mode)
    -Automatic, gear selection and shifting provided by the SMG II. (A-Mode)
  • DRIVELOGIC control to adjust shift programs in the A mode or shift dynamics in the S Mode.
  • Light weight and elimination of torque convertor when compared to an Automatic Transmission.
  • Same basic 6 speed gear box design as Non-SMG II equipped M3.
  • Elimination of clutch pedal.
  • Adaptable based on engine torque and speed.

Type Transm.
1
2
3
4
5
6
reverse
final drive
redline
M3 Coupe manual
4.23
2.53
1.67
1.23
1.00
0.83
3.75
3.62
8000
M3 Cabrio manual
4.23
2.53
1.67
1.23
1.00
0.83
3.75
3.62
8000
· Publicēju marchello December 26 2011
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