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Old 12-27-2010, 11:13 AM
 
474 posts, read 1,301,750 times
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transmission at the same time?
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Old 12-27-2010, 11:19 AM
 
Location: in here, out there
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I remember that Citroen used a semi-automatic transmission but I never drove one.
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Old 12-27-2010, 11:24 AM
 
Location: Vancouver, B.C., Canada
11,031 posts, read 27,012,327 times
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closest thing to that is a flappy paddle gear box semi-auto transsmission
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Old 12-27-2010, 11:38 AM
 
Location: SF Bay Area
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Actually you can get the typical manumatic torque converter driven transmissions that are now present in just about every car I've seen (allows for manual up and down shifts, can be slow on low end transmissions but fairly responsive on good ones) or you can get the clutch based transmissions like BMW's DCT (I believe Nissan's GTR has this as well) that you can manual shift or just leave in drive and let the computer manage the clutch for you. The DCT method is much better than a torque converter based manumatic but also more expensive. We'll see DCT's trickle down to lower end models over time.
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Old 12-27-2010, 11:40 AM
 
Location: Northern MN
3,869 posts, read 14,589,192 times
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kind of.
You mean like the old VW bugs that didn't have a clutch but you had to shift them.
When you touched the shifter it kind of went into Neutral.

or are you talking about like on some tractors that have a clutch but also have the shuttle shifting option where you don't need to use the clutch?
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Old 12-27-2010, 11:56 AM
 
Location: SF Bay Area
5,994 posts, read 17,898,271 times
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Quote:
Originally Posted by snofarmer View Post
kind of.
You mean like the old VW bugs that didn't have a clutch but you had to shift them.
When you touched the shifter it kind of went into Neutral.

or are you talking about like on some tractors that have a clutch but also have the shuttle shifting option where you don't need to use the clutch?
I think its more along the lines of shifting for yourself or letting the computer shift for you.
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Old 12-27-2010, 05:31 PM
 
Location: Eastern Washington
16,210 posts, read 52,996,166 times
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Quote:
Originally Posted by snofarmer View Post
kind of.
You mean like the old VW bugs that didn't have a clutch but you had to shift them.
When you touched the shifter it kind of went into Neutral.

or are you talking about like on some tractors that have a clutch but also have the shuttle shifting option where you don't need to use the clutch?
Actually, on the old "auto-stick-shift" Bug, when you grabbed the gearshift handle that disengaged a clutch very similar to the manual version, I forget how it dealt with stopping without throwing out a clutch, maybe it had a torque converter as well as a clutch, that has been done as well.

To answer the OP's question, my answer would be "sort of" - you have various automatic trans with flappy-paddle or ratchet type shifters that are just a user interface, and you have "manumatic" setups that are a manual transmission but with servo opearated clutch and shifting mechanisms.

But for me, just give me 3 pedals on the floor, and a normal stickshift, maybe with an overdrive or maybe without. Once you have learned to drive a stick the mental load you experience when first using one disappears, but the simplicity and ruggedness of the system remains.
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Old 12-27-2010, 06:33 PM
 
19,023 posts, read 24,849,398 times
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Steve will remember how the VW worked, I forget how that worked too. The shifter has a pair of contacts that ran a vacuum servo, but I forget how it stayed in a 1st/reverse and still stayed running.
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Old 12-27-2010, 06:45 PM
 
Location: Columbia, California
6,664 posts, read 29,344,528 times
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I remember you had to keep your hand off the stick in the VW bug when not shifting, the slightest touch would start to engage it. Too much light touches wore the clutch out.

My dad said the old Doug Nash transmissions were semi auto, I do not know how true that is.
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Old 12-27-2010, 06:50 PM
 
Location: San Antonio, TX, USA
5,142 posts, read 12,503,035 times
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I think so. See this Mazda Rx-8 Specs.
Engine Type
232-hp, RENESIS 2-rotor, rotary engine with 6-speed manual transmission (212-hp, 6-speed Sport automatic transmission) and 3-stage variable induction system (VIS)
My work boss has one of these and you can switch between the transmission of your choice.
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