Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

Diff gear Question

Discussion in 'VZ Holden Commodore (2004 - 2006)' started by jwaye2, Aug 22, 2012.

  1. jwaye2

    jwaye2 New Member

    Messages:
    314
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    Nov 3, 2008
    Location:
    Darwin
    Members Ride:
    VZ Alloytec Sedan, VS L67 Ute
    Does anyone know what the diff ratio is in the standard VZ Exec sedan v6 auto? Wanna put an LSD diff in it and not sure weather to keep the same ration or change it.
    If i end up changing what should i change it to? not building a race car just wanna give it a bit more of a kick.

    Sorry dont know much about diffs

    cheers james
     
  2. richardpalinkas

    richardpalinkas Blown Alloytec

    Messages:
    2,290
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    May 4, 2009
    Location:
    Gold Coast
    Members Ride:
    Raptor Impulse VZ SV6
    Standard is 3.08:1, a good upgrade is the 3.46:1 ratio usually found in manual ss commodores so it should be fairly easy to find one
     
  3. Surfwagon

    Surfwagon Active Member

    Messages:
    1,688
    Likes Received:
    14
    Trophy Points:
    38
    Joined:
    Jun 8, 2006
    Location:
    Sydney/NSW
    Members Ride:
    HSV VZ LS2 Senator
    There is usually a few LSD 3.46's floating around on ebay at any one time and most are LSD as they come out of V8's, HSV and SS's.
    3.46 is probably the best ratio for a stock to lightly modified V6 as it gives it kick without really hurting fuel ecomomy, in fact around town it usually gets better once you stop enjoying the new found squirt.
    Highway fuel economy stays pretty much the same.
     
  4. morphix

    morphix New Member

    Messages:
    661
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jan 3, 2011
    Location:
    Cardiff, NSW
    Members Ride:
    2004 VZ SV6 5-Speed Auto
    What are the rev differences between stock and 3.46? And how much does it affect acceleration?
     
  5. richardpalinkas

    richardpalinkas Blown Alloytec

    Messages:
    2,290
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    May 4, 2009
    Location:
    Gold Coast
    Members Ride:
    Raptor Impulse VZ SV6
    My 1/4 mile changed by .2 seconds, but 0-100 was about half a sec quicker, that's with an sv6
     
  6. BPX-31H

    BPX-31H New Member

    Messages:
    438
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Oct 2, 2010
    Location:
    Sydney
    Members Ride:
    '05 vz sv6
    When you changed your diff who recalibrated your speedo or how'd you do it?
     
  7. Surfwagon

    Surfwagon Active Member

    Messages:
    1,688
    Likes Received:
    14
    Trophy Points:
    38
    Joined:
    Jun 8, 2006
    Location:
    Sydney/NSW
    Members Ride:
    HSV VZ LS2 Senator
    At 100kph difference is about 200 revs more with 3.46 and you will notice the extra punch from the 3.46's.
     
  8. jwaye2

    jwaye2 New Member

    Messages:
    314
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    Nov 3, 2008
    Location:
    Darwin
    Members Ride:
    VZ Alloytec Sedan, VS L67 Ute
    I know the computer will have to be calibrated but if i replace a 3.08:1 with a 3.46:1 will it bolt straight in or will some things have to be changed to make it fit?
     
  9. Surfwagon

    Surfwagon Active Member

    Messages:
    1,688
    Likes Received:
    14
    Trophy Points:
    38
    Joined:
    Jun 8, 2006
    Location:
    Sydney/NSW
    Members Ride:
    HSV VZ LS2 Senator
  10. richardpalinkas

    richardpalinkas Blown Alloytec

    Messages:
    2,290
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    May 4, 2009
    Location:
    Gold Coast
    Members Ride:
    Raptor Impulse VZ SV6
    I took my car to Holden and they recalibrated it for 60 bux
     
  11. djbrentos

    djbrentos New Member

    Messages:
    8
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Dec 15, 2012
    Location:
    sunshine coast
    Members Ride:
    vs 5lt stato
    does this mean when i change my vs vtatesman 5lt diff over to a lsd form a 6lt ls2 will i have to get the cpu recalibrated?
     

Share This Page