How should I adjust my speedometer for 4.30s?

Discussion in 'SVT Forum' started by N/A Cobra, Dec 31, 2003.

  1. N/A Cobra New Member

    Member Since:
    Dec 30, 2003
    Message Count:
    52
    Likes Received:
    0
    Trophy Points:
    0
    How should I adjust my adjust my speedometer for my 4.30 gears? I don't want to pay $100 for the Speedcal from Dallas Mustang. Do they make a plastic gear to put into the transmission for 4.30s that are accurate and last? If so, were can I find one. Would investing in a Hypertech Programmer be worth the $300? Thanks for the help in advance.
    N/A Cobra, Dec 31, 2003
    #1

  2. 99SVTAddict New Member

    Member Since:
    May 8, 2003
    Message Count:
    643
    Likes Received:
    0
    Trophy Points:
    0
    What year car?????

    99 ups need a chip to recalibrate the speedo.
    99SVTAddict, Dec 31, 2003
    #2

  3. blk32V New Member

    Member Since:
    Apr 10, 2003
    Message Count:
    130
    Likes Received:
    0
    Trophy Points:
    0
    Just get the Speedcal from Dallas Mustang, that way you can change your tires and then makes some quick switches with the speedcal and your speedo wont be off then either! Where at in Indiana are you located at?

    Tim
    blk32V, Dec 31, 2003
    #3

  4. missouri_guy197 New Member

    Member Since:
    Sep 1, 2002
    Message Count:
    1,441
    Likes Received:
    0
    Trophy Points:
    0
    They do not make a transmission speedo gear for 4.30's...they only go up to 4.10's and those aren't that accurate...the only way to accurately compensate for 4.30's and to have your speedo exactly on is to get a speedcal...they are very easy to install, 15-20 min tops once you get the shifter bezel off and the car up in the air...

    And you can buy them from brothers performance for $85

    http://brothersperformance.com/shop/mustang/brospeedcal.html
    missouri_guy197, Dec 31, 2003
    #4

  5. CNEPACE Founding Member

    Member Since:
    Jan 12, 2002
    Message Count:
    90
    Likes Received:
    0
    Trophy Points:
    0
    Keep that stock speedo gear in and get a Speedcal. Changing the speedo gear causes the speedo gears to mech closer and they WILL overtime melt/strip. This forces you to remove the transmission tailshaft to replace the speedo drive gear! It happened to me and it sure wasnt fun! I really wish I spent the money on the speedcal!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    CNEPACE, Dec 31, 2003
    #5

  6. tmhutch Founding Member

    Member Since:
    Dec 31, 2001
    Message Count:
    116
    Likes Received:
    0
    Trophy Points:
    0
    Just have your chip reburned for the gears. If you dont have a chip, get one. It will help performance too.

    Todd
    tmhutch, Jan 1, 2004
    #6

  7. N/A Cobra New Member

    Member Since:
    Dec 30, 2003
    Message Count:
    52
    Likes Received:
    0
    Trophy Points:
    0
    Thanks for everything...I will probably just go with the Speedcal. My car is a 96 Cobra.
    N/A Cobra, Jan 1, 2004
    #7

Share This Page