Bob Harper

What’s next for automatic gearboxes?

What’s next for automatic gearboxes?

Posted in Tech, asked by Bob Harper, 5 years ago. 774 hits.

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It seems that for now, at least, BMW has taken the automatic gearbox about as far as it is willing to go. Although its rivals may be soon offering even more gears, BMW say it has already been testing the theory that ‘more is better’ and it’s currently not a worthwhile enterprise. It’s all to do with efficiency gains versus the cost of the development. Testing has shown that changing from a six-speed to an eight-speed gearbox gained between five and ten per cent efficiency but the difference in efficiency between an eightspeed and nine-speed is less than one per cent, making it hard to justify. Adding another gear would also add unwanted weight, so for the time being the great eight will be staying put.

Martin
5 years ago
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