can a car have two gearboxes ?

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skyhawk

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someone told me a car can have both automatic transmission and manual transmission and went on to say a car can have 2 gearboxes. is there any truth in what he said ?
 
skyhawk said:
someone told me a car can have both automatic transmission and manual transmission and went on to say a car can have 2 gearboxes. is there any truth in what he said ?
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A semi-automatic can be driven as an auto, or as tiptronic/paddle shift. DCT or DSG gearboxes have 2 clutches. Never heard of 2 separate gearboxes...
 
There is - usually present as a "transfer gearbox" on some 4x4 models where you can select either high gear (faster speed for open road) or a low gear (when doing bundu bashing)
 
... but two pedals, like an auto
 
The_Librarian said:
There is - usually present as a "transfer gearbox" on some 4x4 models where you can select either high gear (faster speed for open road) or a low gear (when doing bundu bashing)
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I doubt skyhawk's friend was talking about a transfer case... He must have been talking about a DCT.
 
4FD Mini Mokes had two engines and transmissions.

From Wikipedia: "In a further attempt to make something for the army, a few four-wheel drive Mokes were made by the addition of a second engine and transmission at the back of the vehicle with linked clutches and gear shifters."

They were not very successful!
 
Most vehicles only have a single "main" gearbox.
Some 4x4's or offroad vehicles (particularly military) have transfer boxes but they are still driven by one central gearbox output.

Dual clutch systems (DCT, DSG, S-Tronic, etc.) are still integrated into a single gearbox although there may be separate shafts and gear sets for each clutch.
Even so there is still only one final output for the wheels which may then be split into two for four wheel drive applications.

A central diff needs to be added in 4 wheel drive applications to distribute the torque between front and rear wheels evenly (Subaru being a prime example) otherwise tyre size differences or tyre loading (which affects rolling circumference) will make the one set of tyres fight the other.
e.g. Larger front tyres will end up dragging the smaller rear tyres without a centre differential.
 
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The Ferroli mk1 golf comes to mind but I'm certain its not what your friend was referring to.
 
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