Need help selecting new diff gears

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May 10, 2005 | 11:51 AM

gdphillipsvette

Thread Starter

Burning Brakes

Joined: Nov 2004

Posts: 961

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From: Albuquerque NM

Need help selecting new diff gears

I'm in the process of converting my 2002 A4 to an MN6 and need to also change out the rear diff (currently 3.15). The car is stock with only a GHL exhaust and a Haltech Stinger. It will not likely see any track time. BL - I want acceptable in-town performance, plus highway driving. Eventually may go the supercharged route, but that's a ways off. I'm thinking 3.73 or 3.90 and need your advice! Also need your pick on a diff vendor. Thanks.

May 10, 2005 | 12:02 PM

vetteamerica

Racer

Joined: Dec 2004

Posts: 355

Likes: 1

From: Bergen County NJ

4:10's will give the best performance with your set up!!!

May 10, 2005 | 12:04 PM

shurite44

Le Mans Master

Joined: Sep 2004

Posts: 7,027

Likes: 6

From: Shiloh Ohio

You know I probably will get a flame gun turned on me but if I were not going to the track I would no even touch the rear end. But if I did for the street I would stick with 342's.

May 10, 2005 | 12:06 PM

C54FUN

Melting Slicks

Joined: Dec 2000

Posts: 2,204

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From: Bethlehem PA

St. Jude Donor '03-'05-'06-'08-'10

Quote:

Originally Posted by vetteamerica

4:10's will give the best performance with your set up!!!

I would agree if it weren't that he is looking to go to a supercharger later on. I currently have a MN6 with 4.10 gears on my H/C car and they are awesome. IMO for supercharging, the 3.73 is most likely the way to go. As for a differential vendor, I would suggest DTE.
Joe

May 10, 2005 | 12:08 PM

tabbruzz

Safety Car

Joined: Feb 1999

Posts: 4,043

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From: Central NJ

You are changing them anyway from the 3.15s. So if you upgrade that diff the cost should be the same for the 3.73, 3.90 or 4.10s. Personally, I would go 3.73s......

May 10, 2005 | 01:27 PM

gdphillipsvette

Thread Starter

Burning Brakes

Joined: Nov 2004

Posts: 961

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From: Albuquerque NM

ttt

May 11, 2005 | 07:02 AM

gdphillipsvette

Thread Starter

Burning Brakes

Joined: Nov 2004

Posts: 961

Likes: 0

From: Albuquerque NM

ttt

May 13, 2005 | 09:11 AM

gdphillipsvette

Thread Starter

Burning Brakes

Joined: Nov 2004

Posts: 961

Likes: 0

From: Albuquerque NM

Thanks to all who provided feedback. I ended up ordering a DTE 3.90 with the hardened output shaft. The 3.73s are not available right now due to a manufacturing problem with DTEs supplier.