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Is 6th gear the weakest gear?

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Old 03-16-2012, 12:09 AM
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Default Is 6th gear the weakest gear?

Been debating this with a buddy and he says he's certain that 6th gear is used for mostly cruising only. He says on a stock or fairly stock t56 if you're reving the engine into the higher rpms that you wanna go no higher than 5th gear. Any truth to this?
Old 03-16-2012, 12:59 AM
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You will gain no acceleration by going into 6th.
Old 03-16-2012, 01:37 AM
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Right but can 6th handle doing like 130? Without damaging anything?
Old 03-16-2012, 01:48 AM
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I would have to say you could cruise at that speed in that gear, I think. However I would not condone it.
Old 03-16-2012, 08:23 AM
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5th and 6th gears are designed for economy use. Can they be used for other purposes? Sure. I have seen them explode before from someone using them to race.
Old 03-16-2012, 08:36 AM
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^^^ This. Both 5th and 6th are overdrive gears: http://en.wikipedia.org/wiki/Overdrive_%28mechanics%29

You will be able to go faster at lower RPM with them, but will see a drop-off in power.
Old 03-16-2012, 08:37 AM
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It would depent on what specific ratio you are talking about. In the C-F4 T56 2.66LGR set, 5th is the weakest , for example. It is purly dependent on the gear design.
Old 03-16-2012, 10:28 AM
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Now the stock 5/6 gears are indeed for economy use, but how many of us use them for economy use . Now you can run the closer 03-04 cobra 5/6 gear set and they would probably benefit you at higher speeds. But back to what Calhoon stated its going to be based of the actual design of the gear that determines its strength.
Old 03-16-2012, 12:28 PM
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You will have to change the mainshaft for an Aston Martin 30 spline shaft and bore the tail housing to run the Cobra 5th and 6th gears though.
Old 03-16-2012, 01:57 PM
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Originally Posted by Jeremy@RPMTransmissions
You will have to change the mainshaft for an Aston Martin 30 spline shaft and bore the tail housing to run the Cobra 5th and 6th gears though.
Good Point Jeremy
Old 03-16-2012, 02:21 PM
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Originally Posted by Chris@Tick
Good Point Jeremy



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