3.42 differential

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May 17, 2010 | 03:50 PM

Sick C5

Thread Starter

Racer

Joined: Sep 2008

Posts: 375

Likes: 0

From: Dallas Texas

3.42 differential

I'm going to swap my 2.73 for a 3.42. Should I go with a 1-rib or a 3-rib? What should I expect to pay?

May 17, 2010 | 09:21 PM

rodsvet

Pro

Joined: Sep 2008

Posts: 660

Likes: 16

From: Tustin California

I just got a brand new zo6 3:42 from Gene Culley @ GMParts. I got in 3 business days right to my door. It's a 3 rib for strength. Price with shipping and no tax is $1404.27. You might find used but if it's a 3:42 it's probably been beat on unless you really know who you are getting it from. Call Gene, he will treat you right!! Rod

May 18, 2010 | 04:27 AM

ajg1915

Race Director

Joined: May 2005

Posts: 15,960

Likes: 21

From: West Norriton PA

St. Jude Donor '08

3 rib case is stronger. The Z06 differential comes with shot-peened gears.

May 18, 2010 | 08:53 AM

Blitzkrieg

AKA "The CLOWN"

Joined: Feb 2010

Posts: 6,261

Likes: 13

From: Chicago South Suburbs

I'm thinking about 3.42's also, however I have an auto and 3.15's now. Do you guys think I will notice the difference?

May 18, 2010 | 09:03 AM

bumble-z

Le Mans Master

Joined: May 2007

Posts: 5,393

Likes: 17

From: Belleville Mich.

Quote:

Originally Posted by rodsvet

I agree. Put a new one in. That way you're not opening the door for problems, more $$$$ and down time. Good luck.

May 18, 2010 | 09:07 AM

bumble-z

Le Mans Master

Joined: May 2007

Posts: 5,393

Likes: 17

From: Belleville Mich.

Quote:

Originally Posted by Blitzkrieg

I'm thinking about 3.42's also, however I have an auto and 3.15's now. Do you guys think I will notice the difference?

No, it wouldn't be worth the time or money . If however you're doing your own labor, then maybe I would consider. Good luck.

May 19, 2010 | 07:50 PM

99vetteran

Melting Slicks

Joined: Oct 2009

Posts: 2,560

Likes: 485

From: Moberly, Mo

i bought a used 3.42, I broke mine. I paid $500 for a 39,000 mile diff. I also purchased a left hardened output shaft from dte as I plan to take mine to the track again. If you do buy one used, make sure it low mileage, if you can't find one then buy a new one. I had a high mileage one I took to the track and it lasted 2 passes and broke on the third. Also took out the tranny output shaft. Do it right.

May 19, 2010 | 08:14 PM

Chuck01

Burning Brakes

Joined: Aug 2004

Posts: 783

Likes: 0

From: Phoenix Arizona

Quote:

Originally Posted by Blitzkrieg

I'm thinking about 3.42's also, however I have an auto and 3.15's now. Do you guys think I will notice the difference?

I think you will and if you do a TC at same time you will be very happy.

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May 19, 2010 | 08:54 PM

paint it black vette

Melting Slicks

Joined: Aug 2006

Posts: 2,205

Likes: 2

From: port monmouth nj

Quote:

Originally Posted by Blitzkrieg

I'm thinking about 3.42's also, however I have an auto and 3.15's now. Do you guys think I will notice the difference?

yes. but youll notice it more with 3.73 and a stall. gas mileage goes down but the grin gets bigger and who bought a vette to go slow and worry about gas?"