Rear Gear Mod Question
Thread Starter
Heel & Toe
Joined: Mar 2009
Posts: 24
Likes: 0
From: Baltimore MD
Rear Gear Mod Question
Just recently picked up an 05 c6 A4 w/ 273's, however it's a little bit too lazy off of the line for me. Been contemplating changing the rear to a 315 or 342. (This would be my first mod) I want to keep reasonable drivability and fuel mileage so I don't want to go too big. I'd appreciate any feedback from those who have had similar mods done. What kind of gains do you get and whats the cost. Thanks in advance for the responses.
Melting Slicks
Joined: Mar 2006
Posts: 2,026
Likes: 16
St. Jude Donor '12-'13
Will C5 diff. work on C6? Used C5Z rear ends are an inexpensive alternative in C5's. I bought a used 500mile unit for $900.00. with hard shafts. Most used rears are in the $500. range..............Joe
Pro
Joined: Apr 2005
Posts: 702
Likes: 82
From: Ronkonkoma NY
St. Jude Donor '08-'09
Just recently picked up an 05 c6 A4 w/ 273's, however it's a little bit too lazy off of the line for me. Been contemplating changing the rear to a 315 or 342. (This would be my first mod) I want to keep reasonable drivability and fuel mileage so I don't want to go too big. I'd appreciate any feedback from those who have had similar mods done. What kind of gains do you get and whats the cost. Thanks in advance for the responses.
Melting Slicks
Joined: Mar 2008
Posts: 2,835
Likes: 5
From: Avon Park FLORIDA
St. Jude Donor '08-'09-'10
I went from 2.56 to 3.42, it works great!!
Instructor
Joined: Aug 2007
Posts: 190
Likes: 0
From: Costa Mesa Ca
I went from 2.73 to 3.42 and it was a great improvement performance wise!
But I have driven several 3.15's and they are good too. If you are concerned with fuel economy, I would probably stick with the 3.15's.
But I have driven several 3.15's and they are good too. If you are concerned with fuel economy, I would probably stick with the 3.15's.
Drifting
Joined: Apr 2008
Posts: 1,840
Likes: 3
From: halton region Ontario
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Safety Car
Joined: Jan 2008
Posts: 4,711
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From: Middle of No where AK
I went from 2.73 to 3.42. Good improvement especially in the low to mid range. You wont notice a ton of improvement at the track time wise maybe about two tenths if you race. Mileage wasnt affected that much either maybe 1 or 2 mpg.
