Does anybody know the answer?

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Apr 12, 2009 | 03:11 AM

AIKMAN8

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Racer

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Does anybody know the answer?

Hi, I have a C5 and I need to know if my stock 2:73 diff will work in a C6? I know it's a strange question but I really need the answer. Thanks for your help...

Apr 12, 2009 | 08:12 AM

vsocks1

Melting Slicks

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From: Cedarburg, WI

It will not work without modifications. I know some C5 guys are running the C6 rears. The rear cradle has to be swapped out for one. Maybe do a search for one of those posts and your answer would be the reverse! What are you up too?

Apr 12, 2009 | 04:49 PM

AIKMAN8

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Racer

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I upgraded my 2:73's in my C5 to 3:42's and someone I know with a C6 wants to know if my 2:73's will fit in his C6 for whatever reason.

Apr 12, 2009 | 05:25 PM

lionelhutz

Race Director

Joined: Apr 2007

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From: South Western Ontario

Gears Only?

I think the gears are the same. The diff housings are different and will not just swap between C5's and C6's. You have to change some other stuff as well - as already mentioned the rear cradle is one of them and I'm not sure what else but there's likely some other parts. This is a good swap for a C5 but would be a backwards conversion for a C6.

Peter

Apr 12, 2009 | 05:27 PM

Eric D

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From: Howell Michigan

St. Jude Donor '09-'10-'11

Quote:

Originally Posted by AIKMAN8

I upgraded my 2:73's in my C5 to 3:42's and someone I know with a C6 wants to know if my 2:73's will fit in his C6 for whatever reason.

The mounting is completely different, but hey, anything is possible. For the life of me I can't understand anyone wanting to put the C-5 diff in a C-6.

Apr 12, 2009 | 07:14 PM

fdxpilot

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From: Ocean Springs MS

Quote:

Originally Posted by Eric D

The mounting is completely different, but hey, anything is possible. For the life of me I can't understand anyone wanting to put the C-5 diff in a C-6.

An A6 with the 2.56 rear would make the 2.73 a nice upgrade. In fact, I think it's the factory rear-end upgrade.

Apr 12, 2009 | 09:39 PM

Eric D

Tech Contributor

Joined: May 2008

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From: Howell Michigan

St. Jude Donor '09-'10-'11

Quote:

Originally Posted by fdxpilot

An A6 with the 2.56 rear would make the 2.73 a nice upgrade. In fact, I think it's the factory rear-end upgrade.

I can understand the desire to use an in between ratio, what I can't understand is putting in a much weaker differential not to mention the inferior mounting of the C5 compared to C6.

Apr 12, 2009 | 11:16 PM

fdxpilot

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From: Ocean Springs MS

Quote:

Originally Posted by Eric D

I can understand the desire to use an in between ratio, what I can't understand is putting in a much weaker differential not to mention the inferior mounting of the C5 compared to C6.

Yeah, I was just speculating why someone would want the "much despised" 2.73 gear ratio. I'm pretty sure with all the talk about how similar the C5 and C6 are, the original poster didn't realize the rear ends had different mounting methods built into the diff case.