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I'm wondering if this is possible. With a conventional manual transmission (say, Tremec T56), could I install a small computer to press the clutch, change the gears, etc? Obviously, I would have to actually program it to do so, but does anyone know of a reason it'd be impossible? I'm a computer person, not really into cars, but it seems pretty easy to calculate the appropriate shift points, send the right instructions to the transmission at the right time, and all that.

Any thoughts?

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There is a manufacturer out on the market right now who actually does this. Magneti Marelli has an Automated Manual Transmission or AMT. This was discussed in this thread.

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Yes in theory it could be done. But getting the mechanical components to work would be difficult and probably result in an awkward and bulky addition to your car. I suspect the end result would be an expensive and unreliable disappointment.

It would probably be easier to change the entire gearbox for automatic or a sequential box than try and adapt a manual.

Either way you're going to need access to a workshop with a lot of tools and machinery. You'll have to fabricate parts. And there would be lot of work finding parts that could move a gear shift and clutch the right speed the right distance with enough force.

If you're "not really a car" person I'm struggling to comprehend why you would want to do this.

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