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<blockquote data-quote="solo" data-source="post: 421590" data-attributes="member: 18358"><p>An SMG II transmission actually an Electrohydraulic manual transmission which is a type of semi-automatic transmission system, that uses an automated clutch unlike conventional manual transmissions where the driver operates the clutch. The clutch is controlled by electronic computers and hydraulics. To change gears, the driver selects the desired gear with the transmission shift lever, and the system automatically operates the clutch and throttle to match revs and engage the clutch again. Also, many such transmissions operate in sequential mode where the driver can only upshift or downshift by one gear at a time.</p><p></p><p>Depending on the implementation, some computer-controlled electrohydraulic manual transmissions will automatically shift gears at the right points (like an automatic transmission), while others require the driver to manually select the gear even when the engine is at the redline. Despite superficial similarity, clutchless manual transmission differ significantly in internal operation and driver's 'feel' from manumatics, the latter of which is an automatic transmission (automatics use a torque converter instead of clutch to manage the link between the transmission and the wheels) with ability to signal shifts manually. </p><p></p><p>BMW offered a system simply called "sequential manual gearbox" (SMG) on the E36 M3, and later "SMG-II" on the E46 M3. The BMW SMG transmission has both automatic and manual shift modes. Inside the different modes there are different programmes, with six settings to control the upshift/downshift speed for manual operation, and five settings for automatic mode.</p><p></p><p>If you see the symbols "+" and "-" on a gear knob or anyway around a gear shift, then the car has SMG. To shift gears, simply, push the gear shift up to upshift and down to downshift.</p><p></p><p>Simple right, you will never risk entering the wrong gear, with a SMG.</p></blockquote><p></p>
[QUOTE="solo, post: 421590, member: 18358"] An SMG II transmission actually an Electrohydraulic manual transmission which is a type of semi-automatic transmission system, that uses an automated clutch unlike conventional manual transmissions where the driver operates the clutch. The clutch is controlled by electronic computers and hydraulics. To change gears, the driver selects the desired gear with the transmission shift lever, and the system automatically operates the clutch and throttle to match revs and engage the clutch again. Also, many such transmissions operate in sequential mode where the driver can only upshift or downshift by one gear at a time. Depending on the implementation, some computer-controlled electrohydraulic manual transmissions will automatically shift gears at the right points (like an automatic transmission), while others require the driver to manually select the gear even when the engine is at the redline. Despite superficial similarity, clutchless manual transmission differ significantly in internal operation and driver's 'feel' from manumatics, the latter of which is an automatic transmission (automatics use a torque converter instead of clutch to manage the link between the transmission and the wheels) with ability to signal shifts manually. BMW offered a system simply called "sequential manual gearbox" (SMG) on the E36 M3, and later "SMG-II" on the E46 M3. The BMW SMG transmission has both automatic and manual shift modes. Inside the different modes there are different programmes, with six settings to control the upshift/downshift speed for manual operation, and five settings for automatic mode. If you see the symbols "+" and "-" on a gear knob or anyway around a gear shift, then the car has SMG. To shift gears, simply, push the gear shift up to upshift and down to downshift. Simple right, you will never risk entering the wrong gear, with a SMG. [/QUOTE]
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