What if a car's rear gear ratio could 'shift'

"Chuck 2(O=[][]=O)2" (pompei426) 02/17/2014 at 19:39 • Filed to: None

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I was just thinking if you could somehow build a monster hp car with a high gear ratio, but also a lower ratio that could help achieve much lower gas milage. I am guessing that with a system like this you would only need a 4 or 5 speed trans. How off the mark am I? Is this a stupid idea?

Brian, The Life of > Chuck 2(O=[][]=O)2 02/17/2014 at 19:41

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So ... a two-speed rear-end?

UserNotFound > Chuck 2(O=[][]=O)2 02/17/2014 at 19:41

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There was a Corvette or something with two final speeds or something like that.

The Opponaut formerly known as MattP123 > Chuck 2(O=[][]=O)2 02/17/2014 at 19:43

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They exist. Look up the Corvette 4+3 transmission, I think that was how it worked.

Arch Duke Maxyenko, Shit Talk Extraordinaire > Chuck 2(O=[][]=O)2 02/17/2014 at 19:43

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beardsbynelly - Rikerbeard > Chuck 2(O=[][]=O)2 02/17/2014 at 19:44

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or just make top gear overdrive?

If it has monster HP you won't need the lower gears around town anyway.

Team6.1 > Chuck 2(O=[][]=O)2 02/17/2014 at 19:44

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Like a bicycle?

midnightautoparts > Chuck 2(O=[][]=O)2 02/17/2014 at 19:46

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feather-throttle-not-hair > Chuck 2(O=[][]=O)2 02/17/2014 at 19:49

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brilliant!

— man who invented the transmission

desertdog5051 > Chuck 2(O=[][]=O)2 02/17/2014 at 19:54

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Medium duty trucks come with 2 speed rear ends, and have for years. The technology is there.

Chuck 2(O=[][]=O)2 > Brian, The Life of 02/17/2014 at 19:59

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yes

Axial > The Opponaut formerly known as MattP123 02/17/2014 at 20:34

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That wasn't the rear-end shifting. That was a standard T-10 4-speed with an automatic overdrive unit stuck on the back end of it. The rear diff was a regular old D44.