C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Oct 5, 2004 | 09:10 AM
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Default 6 speed

Hi all,

Can anyone tell me if the ZF 6 speed has straight cut gears?

Thanks Getsom
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Old Oct 5, 2004 | 09:56 AM
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Only on 89-93 1/2, or basically all of the black Tags units

EDIT, changed to 93 1/2

Last edited by ld85; Oct 5, 2004 at 11:23 AM.
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Old Oct 5, 2004 | 11:15 AM
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The ones built in West Germany are (`89-`93) straight cut
aka black tags
But if I remember correctly, mid production of `93 is when they switched to non-straight gears (I forget the name of the term).
The ones produced at the ZF plant in Georiga are diagonal cut (`94-`96)
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Old Oct 5, 2004 | 11:21 AM
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Originally Posted by ld85
Only on 89-92 1/2, or basically all of the black Tags units
Seriously??? Those things have to be LOUD! Straight cut gears are pretty noise aren't they? And it's not like the Vette is known for sound deadening.
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Old Oct 5, 2004 | 11:46 AM
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Originally Posted by RainDelay
Seriously??? Those things have to be LOUD! Straight cut gears are pretty noise aren't they? And it's not like the Vette is known for sound deadening.
Yes they are loud when converted to single mass flywheel units. This noise is not talked about much.
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