Dual Clutch - 7 speed
12-27-2011, 05:14 AM
#22
Drifting
I know what you mean!
There is always the Wilson pre-selector gearbox - usually a 4 speed device often fitted to Armstrong Siddeley cars and some Daimlers up the late 50's/early 60's. Used a fluid flywheel rather than a torque converter - featured a tiny 1"or so x 1" gate shifter on a 'pod' next to steering wheel. Idea was to select gear (say 1st), press 'clutch' pedal (which wasn't actually a clutch - it simply activated your chosen gear), car would remain stationary until you hit the gas, when the fluid fywheel would act like a high-stall torque converter and you pulled away. Repeat action again with selector and actuator for next gear. This was also seen on London Buses from the period. Semi-auto I guess would be the simplest description, but with manual selection.
I have been driving buses for just on 18 years now, and up until about five years ago, my company still had a couple of old Leyland buses with a similar transmission. There was no clutch pedal though, only acc. and brake. When you wanted to take off, you just engaged first and depressed the acc. pedal.
When you wanted second, you pulled it into "neutral" and backed off the acc. When you heard the revs drop, you pulled it into second and reapplied the gas, and so on. This method gave very smooth upshifts. You could just keep your foot on the pedal and pull the lever straight into second, but this gave a jerky shift in the lower gears.
For downshifting, I would go from fourth to third with the lever, but would leave it in the neutral position for a second as I revved up the engine and the shift to third was quite smooth.
Ahhh, brings back memories.
Regards from Down Under.
aussiejohn
12-27-2011, 05:33 AM
#23
Drifting
rosco,
I have been driving buses for just on 18 years now, and up until about five years ago, my company still had a couple of old Leyland buses with a similar transmission. There was no clutch pedal though, only acc. and brake. When you wanted to take off, you just engaged first and depressed the acc. pedal.
When you wanted second, you pulled it into "neutral" and backed off the acc. When you heard the revs drop, you pulled it into second and reapplied the gas, and so on. This method gave very smooth upshifts. You could just keep your foot on the pedal and pull the lever straight into second, but this gave a jerky shift in the lower gears.
For downshifting, I would go from fourth to third with the lever, but would leave it in the neutral position for a second as I revved up the engine and the shift to third was quite smooth.
Ahhh, brings back memories.
Regards from Down Under.
aussiejohn
I have been driving buses for just on 18 years now, and up until about five years ago, my company still had a couple of old Leyland buses with a similar transmission. There was no clutch pedal though, only acc. and brake. When you wanted to take off, you just engaged first and depressed the acc. pedal.
When you wanted second, you pulled it into "neutral" and backed off the acc. When you heard the revs drop, you pulled it into second and reapplied the gas, and so on. This method gave very smooth upshifts. You could just keep your foot on the pedal and pull the lever straight into second, but this gave a jerky shift in the lower gears.
For downshifting, I would go from fourth to third with the lever, but would leave it in the neutral position for a second as I revved up the engine and the shift to third was quite smooth.
Ahhh, brings back memories.
Regards from Down Under.
aussiejohn
