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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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    7,000

    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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    Corvette C5

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

  3. #23
    Super Moderator 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.

  4. #24
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    sliver
    2006 solstice

    Im trying to find some info...Ive looked everywhere I can think of. what I want to know is...2008 cts dif internals and 2008 sts diff internals, are they interchangable? I know the cts is a different housing. but are the innards the same?? not woried about ratios. but the cts has the axle flanges on the unit and the sts has them on the half shafts/axles. so are the ring gear carriers interchangable??what about the gears if I want to change ratios too?( Ive set up lots of rears in the past,no issuses there) I dont want to buy the cts Ive found at a good price if the innards wont fit my sts( also in the pontaic solstice/saturn sky cars). I want to build a spare for my car so I can rebuild mine. I already got the sts but it's had some h20 in it....( ebay junk) and now I find another ebay rear with g80 at a good price if the innards will swap..thanks for any info!!!

  5. #25
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    sliver
    2006 solstice

    I know this is a old thread but does any body have a clue if the innards are interchangable. there seems to be almost zero info on these gkn/getrag rearends.??thanks for any info.

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