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Anyone converted a C5 6speed to a Auto?

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Old Apr 20, 2010 | 10:03 AM
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Default Anyone converted a C5 6speed to a Auto?

I'm just curious if anyone has ever converted a 02 C5 Vette manual to an auto trans. If so whats all involved and needed etc?

Thanks!
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Old Apr 20, 2010 | 04:19 PM
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I have converted my 98 C5 from a M6 to an A4. It's pretty easy to do, and for the most part is a bolt-in. The only tricky part is some of the wiring as the harnesses are different for the M6 vs A4.
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Old Apr 22, 2010 | 10:15 AM
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I figured it might be, what would be the easiest way to do it? Buy a wrecked auto C5 or just start hunting for all the crap piece by piece?

So what all needs to change besides the obvious?
1) I'm assuming the torque tubes & bell housings are different?
2) Gotta have the tranny cooler + lines?
3) Interior plastic + shifter stuff & brake pedal
4) What all for electronics?
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Old Apr 22, 2010 | 12:53 PM
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Originally Posted by Ksths2
I figured it might be, what would be the easiest way to do it? Buy a wrecked auto C5 or just start hunting for all the crap piece by piece?

So what all needs to change besides the obvious?
1) I'm assuming the torque tubes & bell housings are different?
2) Gotta have the tranny cooler + lines?
3) Interior plastic + shifter stuff & brake pedal
4) What all for electronics?
Your best bet is to get all the components from one vehicle so that you get all of the parts/bolts/brackets/covers that you need.

You will need: flexplate, torque tube, trans, converter, front and rear bellhousings, tranny cooling lines, A4 radiator (or external cooler), shifter and cable, brake pedal. No interior plastic needs to be changed. Also the seal plate that goes in between the A4 and differential is different vs the M6 plate.

Your PCM will need to be reflashed to run the A4.

The wiring is a little tricky but do-able. See the link below to glean some tips as there are differences in the wiring harnesses from year to year. What I did was to take a junk A4 wiring harness and strip it down to just the wires that I need. I used this as an add-on wiring harness that interfaces between the PCM and A4. It also has other wires in it like the reverse lights, Park/Neutral interlock. In this manner, I didn't have to swap out any wiring harnesses, rather I just added wires to run the A4.

http://forums.corvetteforum.com/c5-t...-problems.html
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Old Apr 22, 2010 | 04:43 PM
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I'll bite

Why would you swap to A4 when you're starting with M6?
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Old Apr 22, 2010 | 04:45 PM
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Originally Posted by Pocket
I'll bite

Why would you swap to A4 when you're starting with M6?
Agreed, that is grounds to revoke your man card
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Old Apr 22, 2010 | 05:01 PM
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harness would be the only tricky part.. or just go th400
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Old Apr 22, 2010 | 08:45 PM
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harness would be the only tricky part.. or just go th400
Harness is 14 more wires. The IGN is reused from the manual wiring. A JY connector and an hour will handle the job

How would you fit a TH400 in a C5? Last I checked they didnt make very many transaxles, esp not TH400s. I doubt he'd be interested in re-engineering the entire chassis for a simple trans swap
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Old Apr 23, 2010 | 10:07 AM
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lol, the only reason i'm considering this idea is as my car is leaning more and more towards being a dedicated car to dragracing i figure someday that may happen to get rid of any "off the gas to shift" times and i don't want to powershift this car on spray if fear of missing a shift and then hitting the rev limiter on the spray.
I dunno, it was just a feeler to see if it was even possible. But right now i do like rippin the gears for sure!
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