Replace gear or entire Diff?
Thread Starter
Pro
Joined: May 2008
Posts: 638
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From: The High Mountains of North Texas
Replace gear or entire Diff?
I recently realized my base A6 car has 3.15 gears. I am wanting to switch to 3.42s. Which is the best/easiest/cheapest way to get there? I've seen the RPM diffs for around $3000, obviously have better stuff in them. Is switching just the gear out in a stock diff a real challenge? Is swapping in a whole different diff easier? Can I use a used diff out of another Vettte, like a manual car or ZO6?
Thoughts greatly appreciated.
Thoughts greatly appreciated.
Race Director
Joined: Sep 2007
Posts: 16,557
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
IIRC a Z06 rear assembly is a bolt in. I got in on the last half of a friend's install, so missed some of the details. Christopher (theSubfloor) has done several. He's mostly on the C7 Z06 forum now, but does slip down here on occasion.
Supporting Vendor
Joined: Feb 2011
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2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
Yes, a Z06 differential is a direct replacement and is a LOT cheaper than any of your aftermarket options.
Supporting Vendor
Joined: Feb 2011
Posts: 3,520
Likes: 880
2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
Regular hand tools, three jackstands and hockey pucks, floor jack and transmission jack. I've got a complete How To guide I can email you if you're looking to do the job yourself.
