Question - Modding an 04 C5 Auto 2.73

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Jun 3, 2005 | 04:33 PM

#21

z28nbr1fan

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Staging Lane

Joined: Aug 2004

Posts: 71

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Quote:

Originally Posted by Kraest

I wouldn't mess with anything under a 3.73 gear. I know how expensive those C5 differentials are

I'd get the upgraded output shaft as well. The labor on the diff replacement is rated around 10 hours.

No need to do it twice.

Mike

I helped with picking the ratio....fuel efficiency played a larger part in the decision.

I think an upgraded shaft would be a bit redundant. The car will never see hard launches, DRs, or 1/4 mile runs.

Jun 3, 2005 | 04:49 PM

#22

Kraest

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From: Covington, LA

I'm still getting 26mpg on the interstate in 6th gear with my new cam and 4.10 gear.

A 4.10 made my RPM @ 70ish go from 1400 to 2000. No big deal

Mike

Mike

Jun 4, 2005 | 10:03 PM

#23

FACE

TECH Apprentice

Joined: Nov 2001

Posts: 359

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From: Long Island

Quote:

Originally Posted by z28nbr1fan

The upgraded shafts aren't required unless you'll be running a DR with a high stall and/or a shift kit. Come to think of it, I've never heard of a A4 breaking one yet, but it's cheap insurance for a A4 that sees heavy abuse.

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