Differential
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
You may have to change your input shaft on the trany sense these I believe comes with the heavy duty Z input shaft, i can work you out a good deal I'm rite here in Miami I can install it for you as well or help you out.
Former Vendor
Joined: Sep 2010
Posts: 682
Likes: 11
From: Anderson Indiana
Hi,
We have many different options for a differential in your C6. Our most popular is the 3.15 and 3.42 Stage 3 build. We would be happy to build you one and get you back on the road.
Give me a call at 1-800-406-1109 and we can discuss what would work best for you.
Thank you,
Jeremy
We have many different options for a differential in your C6. Our most popular is the 3.15 and 3.42 Stage 3 build. We would be happy to build you one and get you back on the road.
Give me a call at 1-800-406-1109 and we can discuss what would work best for you.
Thank you,
Jeremy
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
I just changed my diff after a heads and cam and went for the ZR1 3.42 the one i removed have 23k miles and is out of a 2011 A6 grand sport and has the factory 2.73 gears upgrade in it, if you can use that let me know.
You may have to change your input shaft on the trany sense these I believe comes with the heavy duty Z input shaft, i can work you out a good deal I'm rite here in Miami I can install it for you as well or help you out.
You may have to change your input shaft on the trany sense these I believe comes with the heavy duty Z input shaft, i can work you out a good deal I'm rite here in Miami I can install it for you as well or help you out.
Thread Starter
Instructor
Joined: Jun 2006
Posts: 114
Likes: 0
From: Pembroke Pines Fl
I just changed my diff after a heads and cam and went for the ZR1 3.42 the one i removed have 23k miles and is out of a 2011 A6 grand sport and has the factory 2.73 gears upgrade in it, if you can use that let me know.
You may have to change your input shaft on the trany sense these I believe comes with the heavy duty Z input shaft, i can work you out a good deal I'm rite here in Miami I can install it for you as well or help you out.
You may have to change your input shaft on the trany sense these I believe comes with the heavy duty Z input shaft, i can work you out a good deal I'm rite here in Miami I can install it for you as well or help you out.
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
Yes, that is correct. I installed a Z06 diff in my 2013 GS. Straight bolt-in deal, except that you need some plugs for the oil cooler lines on the Z diff. I bought the kit for that from Zip along with the new diff.
One thing that has been noted however, is that, because of the larger ring gear diameter in the Z06 diff, the splines on the output shaft of the A6 do not engage fully in the pinion, to the order of about ~3/4". I don't think that is a big deal though, as and l haven't heard about anyone shearing the shaft because of this yet. There's guys who swear by this combo, like subfloor, who has made 100s of passes on his 427, A6, Z06 drivetrain, running ~1.2x 60' times with the front wheels dangling out of the hole. If it works for him...
Having said that, if I had to do it over again, I would probably just go with 3.15s and do over the stock A6 diff with a few upgrades.
I like the 3.42s, but they make 1st gear almost totally useless, IMV.
My recommendation would be to get an upgraded A6 diff from RPM with 3.15s.
One thing that has been noted however, is that, because of the larger ring gear diameter in the Z06 diff, the splines on the output shaft of the A6 do not engage fully in the pinion, to the order of about ~3/4". I don't think that is a big deal though, as and l haven't heard about anyone shearing the shaft because of this yet. There's guys who swear by this combo, like subfloor, who has made 100s of passes on his 427, A6, Z06 drivetrain, running ~1.2x 60' times with the front wheels dangling out of the hole. If it works for him...
Having said that, if I had to do it over again, I would probably just go with 3.15s and do over the stock A6 diff with a few upgrades.
I like the 3.42s, but they make 1st gear almost totally useless, IMV.
My recommendation would be to get an upgraded A6 diff from RPM with 3.15s.
Last edited by CI GS; Jan 26, 2016 at 09:31 AM.
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Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
I have a base car and built a whole diff from parts. It started as a ring and pinion, then a Quaife, then HD out put shaft, then the bigger pinion bearing, then a cooler, so I ended up buying the remaining parts to build a whole diff. The issue is that I ended up spending $5K, but I got what I wanted.
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
I have a base car and built a whole diff from parts. It started as a ring and pinion, then a Quaife, then HD out put shaft, then the bigger pinion bearing, then a cooler, so I ended up buying the remaining parts to build a whole diff. The issue is that I ended up spending $5K, but I got what I wanted.
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Is very simple though..
Former Vendor
Joined: Sep 2010
Posts: 682
Likes: 11
From: Anderson Indiana
But the complete differential will not fit either transmission. 05 Differential cases are 05 specific and terribly unreliable.
