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Rear end help

This is a discussion on Rear end help within the Drivetrain forums, part of the LSx Technical Help Section category; just put 4:10s an a posi in my 98 Z. can /how do I get the speedo recalibrated?...

  1. #1
    Junior Member
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    1998 Z28

    Rear end help

    just put 4:10s an a posi in my 98 Z. can /how do I get the speedo recalibrated?

  2. #2
    Member RARON455's Avatar
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    white
    98 Ram air T/A Ls1/T-56

    You have to have a program that will let you get into the plc and make changes, if you do it yourself. You can also have a speed shop do it for you, I know of some here in north texas.
    Your other option is to pull your pcm and send it in to a tuner. I highly recommend Frost at lsxtune.com he is a sponsor on this site, and not only can he change your speedo he can put a custom tune in the pcm and you will get a little more power and speed, truly beneficial if you have bolt ons. I believe he is running a special right now for 125$ for a tune. I had him do mine and noticed a big difference.

    Either way you have to hook up to the computer and change something to correct your speedo.

  3. #3
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    1998 Z28

    Quote Originally Posted by RARON455 View Post
    You have to have a program that will let you get into the plc and make changes, if you do it yourself. You can also have a speed shop do it for you, I know of some here in north texas.
    Your other option is to pull your pcm and send it in to a tuner. I highly recommend Frost at lsxtune.com he is a sponsor on this site, and not only can he change your speedo he can put a custom tune in the pcm and you will get a little more power and speed, truly beneficial if you have bolt ons. I believe he is running a special right now for 125$ for a tune. I had him do mine and noticed a big difference.

    Either way you have to hook up to the computer and change something to correct your speedo.
    Right on..... thanks for the info!

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