Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

Changing diff ratio in VZ SS - how can speedo be corrected?

Discussion in 'VZ Holden Commodore (2004 - 2006)' started by exec57l, Jan 25, 2017.

  1. exec57l

    exec57l New Member

    Messages:
    24
    Likes Received:
    5
    Trophy Points:
    3
    Joined:
    Sep 30, 2005
    Members Ride:
    VT EXECUTIVE
    Hi Everyone

    I am looking at fitting a 3.73 LS diff I bought for my 2006 VZ SS auto which came with a 3.07 diff ratio. The car is a 6L and has the 4L65e auto.

    Can anyone tell me 100% if I can get the speedo corrected through a tune or if it has to be done another way? Been doing a bit of reading and there is a variety of answers from yes it can be done through the tune to no it has to be done through a Jaycar kit?
     
  2. axemurderer101

    axemurderer101 Well-Known Member

    Messages:
    1,817
    Likes Received:
    74
    Trophy Points:
    48
    Joined:
    Jun 14, 2006
    Location:
    Albany
    Members Ride:
    VY SS
    I got mine done by holden but my car was a manual, autos might need shift points adjusted through a tune though.
     
  3. acarmody

    acarmody Donati..Whoa Green

    Messages:
    5,920
    Likes Received:
    43
    Trophy Points:
    48
    Joined:
    Apr 29, 2007
    Location:
    Brisbane
    Members Ride:
    VX Berlina
    Anyone with a Tech2 can do it. But getting a good tune will help you get the most out of the change.
     
  4. caaf

    caaf Member

    Messages:
    561
    Likes Received:
    12
    Trophy Points:
    18
    Joined:
    May 11, 2009
    Location:
    Melb, Vic
    Members Ride:
    VYII Equipe S/wagon V6
  5. Trayner

    Trayner Fresh prince of Pakky

    Messages:
    1,411
    Likes Received:
    91
    Trophy Points:
    48
    Joined:
    Aug 21, 2008
    Location:
    Pakenham , VIC
    Members Ride:
    Vz ss 6.0L Thunder , Vz S One Tonner
    tech 2 or envyouscustoms software can do it , just have to change the PPK count . Not to sure with the auto thou if it would have to have the shift points changed or not .
     

Share This Page