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question about my new gears

This is a discussion on question about my new gears within the Drivetrain forums, part of the LSx Technical Help Section category; I recently had 3.73s installed in my a4 z28. I babied it for awhile, but while beating the shit out ...

  1. #1
    Member 1986camarojoe's Avatar
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    99 Z28 04 Corvette

    question about my new gears

    I recently had 3.73s installed in my a4 z28. I babied it for awhile, but while beating the shit out of it I noticed it revs real high before it shifts and kinda stays there for awhile before shifting, almost like the transmission is slipping. Is this because of the higher rpms of the new gears causing it to hit the rev limiter? Should I change my shift points? Also under hard acceleration I'm getting some wheel hop which I never had before, currently I only have subframe connectors and a stb. How can I eliminate that? Thanks for any help.

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    Member koolaid_kid's Avatar
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    Arrest Me Red
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    Sounds like you will need to change your shift points. Your PCM could be set to shift at particular speed, rather than RPM. What tuning software do you have?
    If you willl go to the suspension and handling section, you can find many threads about wheel hop elimination. Do a search on LCAs (lower control arms), torque arms, and relocation brackets. That should give you some food for thought.
    Best of luck.

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    Senior Member Wheeler99WS6's Avatar
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    Member 1986camarojoe's Avatar
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    99 Z28 04 Corvette

    I dont have any tuning software yet, but I know my speedo is way off now. Will any tuner work or are some better than others?

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    Member koolaid_kid's Avatar
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    Research in the Computer and Tuning section for that answer. Opinions vary, and the choice is yours. Having used both a handheld and a computer-based tuner, I recommend the computer (laptop) based systems.
    Best of luck.
    Yes, any will correct your speedometer.

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by 1986camarojoe View Post
    I dont have any tuning software yet, but I know my speedo is way off now.
    this is why you are having shifting issues. you haven't changed the gear ratio in the computer yet. shift points are determined by rpms and mph. right now, they aren't matching.

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