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Rear End FAQ!

This is a discussion on Rear End FAQ! within the Drivetrain forums, part of the LSx Technical Help Section category; Lets add : Rear end gear ratio RPO codes 2.73's (GU2) for autos 3.23's (GU5) for autos 3.42's (GU6) for ...

  1. #21
    Moderator Cutlass's Avatar
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    Apr 2008
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Lets add :
    Rear end gear ratio RPO codes
    2.73's (GU2) for autos
    3.23's (GU5) for autos
    3.42's (GU6) for M6.
    Any others??

  2. #22
    Junior Member
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    Apr 2011
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    Norway
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    Corvette C5

    What is a comfortable rpm for the ls1 on highway cruising?

  3. #23
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    pajeff02's Avatar
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    Black & Blue
    '02 WS.6 / '07 Suburban

    Keep it around 2,500 to no more than 3,000 -- that's our A4 car with 3.73's out back while tooling down the interstates at speed.

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