is it possible to have both automatic and manual (GTR, manual transmission, engine)

[brassbin]

transmission at the same time?

[Charles22]

I remember that Citroen used a semi-automatic transmission but I never drove one.

[GTOlover]

closest thing to that is a flappy paddle gear box semi-auto transsmission

[iTsLiKeAnEgG]

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.

[snofarmer]

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?

[iTsLiKeAnEgG]

Originally Posted by snofarmer

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.

[M3 Mitch]

Originally Posted by snofarmer

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.

[Mac_Muz]

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.

[ferretkona]

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.

[skeet09]

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.