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

converting 4+3 to a 6 speed

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Old Jul 11, 2002 | 04:00 PM
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Default converting 4+3 to a 6 speed

I have been asked if i could convert a friends 4+3 to a 6speed. I found the ecklers kit which contains everything needed for the conversion. Has anybody had this done to there car? I need to get an idea of what a fair labor charge should be. Any input would be greatly appreciated.
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Old Jul 11, 2002 | 04:37 PM
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Default Re: converting 4+3 to a 6 speed (sdixon)

I'd like to know what's involved with this swap too.

The main thing I'm curious about is the shifter. I'm assuming the Richmond uses a different one. Does it bolt in place of the original or are some trans tunnel mods required?

sdixon: you're not the CART driver Scott Dixon are you?
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Old Jul 11, 2002 | 04:39 PM
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The richmond 6-speed you see in Ecklers is the one designed by richmond to be a direct swap over from the 4+3. It has a custom tailshaft to bolt right up to our torque arm, and a special shifter. I think there may be some self-fabrication involved, but I am unsure of what.

I'm thinking of going to a richmond if I break too many more 4+3 parts. :D
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Old Jul 11, 2002 | 04:47 PM
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Default Re: converting 4+3 to a 6 speed (jmr302)

Nope, don't do any cart racing.
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Old Jul 11, 2002 | 05:25 PM
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Default Re: converting 4+3 to a 6 speed (sdixon)

There have been may that did the 6sp swap. When done, some like it, others are not happy w/ it.

If you do it, you will asking what gear ratios do I choose. I'm not sure you will get a consensus w/ that one.
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Old Jul 12, 2002 | 02:54 AM
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Default Re: converting 4+3 to a 6 speed (sdixon)

I've done the swap. Very straight forward. Ecklers has everything you need except ONE item: you need to fab an aluminum shield to cover the spot in the tranny tunnel where the stock shifter bolts up. Richmond's shifter traditionally bolts to the tranny. Gears are heavy duty designed with less 'angle' so expect a little gear hum.
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