3.15 Question

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Feb 17, 2006 | 01:56 AM

#21

BlackMidNite

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Joined: Oct 2005

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From: Pope AFB NC

Im thinking about changing my set up for my A4. what do you guys think is the first thing I should do?? changing the rear or new tourque conveter? or maby I should wait and do both at the same time??? And what do you suggest going with on those??

Thanx
Nate

Feb 17, 2006 | 04:21 AM

#22

slverc5

Melting Slicks

Joined: Aug 2004

Posts: 2,879

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From: Plainfield Ill.

Quote:

Originally Posted by BlackMidNite

If you have the money, some say do them at the same time, cheaper labor cost as opposed to bringing down the tranny twice but that's the only advantage. Otherwise, stock T/C are able to handle the 3.42 rear for an A4 if you decide to upgrade which is what i'm going to do to. I'm keeping my T/C stock and changing the rear end from 3.15 to 3.42

Feb 17, 2006 | 10:56 AM

#23

BlownV6

Drifting

Joined: Dec 2004

Posts: 1,937

Likes: 1

From: Tempe Az

Quote:

Originally Posted by BlackMidNite

Do you drive your C5 a lot? Because if you do a big stall and 3.42's is going to kill your gas mileage.

Do a stall first and see how you like it. Atleast 3000 or it's not even worth it.

Feb 20, 2006 | 04:58 AM

#24

BlackMidNite

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From: Pope AFB NC

Ya the C5 is my daily driver. But I want more kick!! i know with just the T/C it will drop 1/2sec in the qt. mile. What will i get in the qt. mile if i go with just the 3.42 rear end??

Oh and what should somthing like this cost me all to get the T/C and installed. Or the rear and installed?

Thanx
Nate

Feb 20, 2006 | 06:02 AM

#25

ILM-Express

MFIC

Joined: Aug 2005

Posts: 1,997

Likes: 14

From: Charlotte, North Carolina

Quote:

Originally Posted by flynbya2

a-4's with performance axle are not that bad......I have one

Feb 20, 2006 | 10:02 AM

#26

RTSVET

Safety Car

Joined: Mar 2005

Posts: 4,080

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From: Dardenne Prairie Mo.

Quote:

Originally Posted by flynbya2

a-4's with performance axle are not that bad......I have one

I love mine.

Feb 20, 2006 | 10:22 AM

#27

mph1972

Race Director

Joined: Apr 2004

Posts: 16,135

Likes: 5

From: Newberry FL

Cruise-In VIII Veteran

St. Jude Donor '07

Quote:

Originally Posted by flynbya2

a-4's with performance axle are not that bad......I have one

I love mine and I had a 1999 Z28 with a M6 and yes at times I miss it, but the 3:15 is really a nice setup.

Feb 20, 2006 | 10:26 AM

#28

YO-EL

Race Director

Joined: Oct 1999

Posts: 17,710

Likes: 1,219

From: Phila PA, Bonita Springs FL

Quote:

Originally Posted by BlownV6

2.73's with a 3000 stall is amazing. I don't even want to step up to 3.42's or 3.73's.

Ignorance is bliss....

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Feb 20, 2006 | 12:51 PM

#29

JMc

Le Mans Master

Joined: Dec 2005

Posts: 6,420

Likes: 5

From: "This is not a psychotic episode, but a cleansing moment of clarity."

I've got the A4 315 combo. Love it. Blackmidnight's sig pic is awesome. Even better without the graphics, though.

Feb 20, 2006 | 03:40 PM

#30

Mike Mercury

Team Owner

Joined: Apr 2001

Posts: 54,204

Likes: 180

From: S.W. Ohio. . . . . . NRA Life Member

Quote:

Originally Posted by YO-EL

Ignorance is bliss....

Feb 21, 2006 | 01:31 AM

#31

BlackMidNite

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From: Pope AFB NC

Thanx JMC. Ya I was thinking the same thing.

Ok so all stock A4s are 3.15?? Or just some?? It was posted that some are 2.73.

Thanx
Nate

Feb 21, 2006 | 01:57 AM

#32

JMc

Le Mans Master

Joined: Dec 2005

Posts: 6,420

Likes: 5

From: "This is not a psychotic episode, but a cleansing moment of clarity."

Quote:

Originally Posted by BlackMidNite

Thanx JMC. Ya I was thinking the same thing.

Ok so all stock A4s are 3.15?? Or just some?? It was posted that some are 2.73.

Thanx
Nate

Hi Nate,

The 3.15 axle was an option. The 2.73 was the standard ratio for A4's.

Feb 21, 2006 | 08:03 AM

#33

PEW01

Pro

Joined: Mar 2005

Posts: 532

Likes: 0

From: Mesquite, The Republic of Texas

Quote:

Originally Posted by jedicowboy

3.15s

Mine's fast

Feb 21, 2006 | 11:26 AM

#34

Sully0212

Instructor

Joined: Nov 2005

Posts: 118

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From: Reno NV

Good thread

Quote:

Originally Posted by BlackMidNite

Thanx JMC. Ya I was thinking the same thing.

Ok so all stock A4s are 3.15?? Or just some?? It was posted that some are 2.73.

Thanx
Nate

Nate,
I'm referring you to a thread in the "other" Corvette Forum that I started regarding upgrading my 2:73 differential in my 04 CE coupe. "Mike Mercury" posted a very good synopsis of what he did and why...might help you in your decision.
See this link: http://www.corvetteactioncenter.com/...ad.php?t=78755
Hope it helps!
Sully
BTW, I haven't done my mod yet...saving $$ to buy the 3:42 differential!

Feb 21, 2006 | 01:07 PM

#35

BATM4N

Le Mans Master

Joined: Feb 2006

Posts: 5,488

Likes: 4

From: USA

I have a 2.73 ratio rear axle on my 98 automatic

according to the paperwork.

Is this good or bad?
I noticed no one' reply's said they had that

Feb 21, 2006 | 01:09 PM

#36

Mike Mercury

Team Owner

Joined: Apr 2001

Posts: 54,204

Likes: 180

From: S.W. Ohio. . . . . . NRA Life Member

Quote:

Originally Posted by BlackMidNite

Thanx JMC. Ya I was thinking the same thing.

Ok so all stock A4s are 3.15?? Or just some?? It was posted that some are 2.73.

Thanx
Nate

check here:

http://mikemercury.home.att.net/ratio.htm

Feb 21, 2006 | 01:16 PM

#37

Plentyfast

Team Owner

Joined: Jul 2002

Posts: 22,194

Likes: 27

From: Aurora IL

Drop a 3k Stall w/3.15 A4

Varoooom

Feb 21, 2006 | 01:26 PM

#38

BATM4N

Le Mans Master

Joined: Feb 2006

Posts: 5,488

Likes: 4

From: USA

Thanks Mike!

Quote:

Originally Posted by Mike Mercury

check here:

http://mikemercury.home.att.net/ratio.htm

That was some very interesting and valuable info to know

This site never ceases to amaze me with all your insight information

Feb 22, 2006 | 01:42 AM

#39

BlackMidNite

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From: Pope AFB NC

hmmm what to do what to do. LOL

correct me if im wrong but I can buy a used 3.42 rear off a 6spd and through it in my A4??

thanx 4 all Ur help
nate

Last edited by BlackMidNite; Feb 22, 2006 at 01:50 AM.

Feb 22, 2006 | 07:47 AM

#40

slverc5

Melting Slicks

Joined: Aug 2004

Posts: 2,879

Likes: 0

From: Plainfield Ill.

Quote:

Originally Posted by BlackMidNite

hmmm what to do what to do. LOL

correct me if im wrong but I can buy a used 3.42 rear off a 6spd and through it in my A4??

thanx 4 all Ur help
nate

That's what I'm doing. If you have 2.73 rear end, you will need a whole pumpkin. But if you have 3.15 gears, you can just get the 3.42 ring/pinion and have a reputable shop do the install for you, sometimes it's cheaper to go this route unless you can buy a used whole assembly 3.42 rear end. And yes for the A4, you will need to reprogram the shift points. For MN6 you won't need too.

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