2004 vs 2006 rear diff.
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2004-2007 Cadillac CTS-V Performance Mods Discussion, 2004 vs 2006 rear diff. in Cadillac CTS-V Series Forum - 2004 - 2007; I'm looking at 2 V's this weekend. 04 & 06. Is the 2006 rear diff any better than the 2004 ...
  1. #1
    the blur's Avatar
    the blur is offline Cadillac Owners Enthusiast
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    2004 vs 2006 rear diff.

    I'm looking at 2 V's this weekend. 04 & 06. Is the 2006 rear diff any better than the 2004 ? I know the LS2 is nicer than the LS6, but I'm more concerned about the rear diff, as I will tracking the car, rather hard. Auto-x, Road course, maybe a drag strip or 2.

    The 06 is $10K more expensive, but less mileage.

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    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: 2004 vs 2006 rear diff.

    The original differential in a 2006 V is a better dramatically better unit than the original differential in a 2004 V. Many 2004 Vs however, no longer have their original differential and a 2004 V could have the latest differential (released in early 2008 as a replacement part), which is still better than a 2006 original unit.

    The 2006 V also has other improvements. I love my LS6, but if I were buying a used V I would look first and the 2006s and 2007s.

  4. #3
    rand49er's Avatar
    rand49er is offline Cadillac Owners 10000+ Posts
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    Re: 2004 vs 2006 rear diff.

    Quote Originally Posted by the blur View Post
    ... I know the LS2 is nicer than the LS6 ...
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

  5. #4
    rjoffe is offline Cadillac Owners Connoisseur
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    Re: 2004 vs 2006 rear diff.

    Quote Originally Posted by the blur View Post
    maybe a drag strip or 2.
    Not if you want to keep the diff underneath it.
    darkman and darkman like this.

  6. #5
    mackey is offline Cadillac Owners Fanatic
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    not worth $10k more IMO. thatll buy you a 8.8 or 9 conversion with spare change for wheels/tires. keep looking.

  7. #6
    ls6v is offline Cadillac Owners Member
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    Re: 2004 vs 2006 rear diff.

    How is an ls2 "nicer" than an ls6? All that extra hp?

  8. #7
    fazz1225 is offline Cadillac Owners Member
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    Quote Originally Posted by ls6v
    How is an ls2 "nicer" than an ls6? All that extra hp?
    Enter the towing motor vs baby motor jokes here! Haha

  9. #8
    etcts-v's Avatar
    etcts-v is offline Cadillac Owners Enthusiast
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    Re: 2004 vs 2006 rear diff.

    Save the 10k and go with the 04, spend the $10k on aftermarket goodies, you'd be a lot better off with an 8.8 that a factory 2006 diff, you could actually track and drag it with an 8.8, not with a factory diff though.

  10. #9
    thebigjimsho's Avatar
    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    The LS6 is more fun to rev.

  11. #10
    odthetruth's Avatar
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    Re: 2004 vs 2006 rear diff.

    The LS2 has a larger displacement which comes in handy under modifications, makes more torque across the powerband stock, revs to the same RPM as the LS6, and generally puts down more usable power on the dyno.

    However, I'll have to agree... for 10k more, you can get an 8.8 setup and be solid in comparison to the '06, then you can save the remainder for a cam setup and assist that tiny feeble infantile 5.7 liter into making real world power.

    [edit]
    I'm sorry gentlemen, figured I'd start this one up.

    [2006 CTS-V - "The Vee Baby Seamus"] - 372rwhp / 361rwtq
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  12. #11
    FoD
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    Re: 2004 vs 2006 rear diff.

    Overcompensating much?

  13. #12
    Heavybody is offline Cadillac Owners Fanatic
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    My 04 still has its original diff ... And nearly 70,000 miles


    Save the money for improving the car!

  14. #13
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    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    Quote Originally Posted by odthetruth View Post
    The LS2 has a larger displacement which comes in handy under modifications, makes more torque across the powerband stock, revs to the same RPM as the LS6, and generally puts down more usable power on the dyno.

    However, I'll have to agree... for 10k more, you can get an 8.8 setup and be solid in comparison to the '06, then you can save the remainder for a cam setup and assist that tiny feeble infantile 5.7 liter into making real world power.

    [edit]
    I'm sorry gentlemen, figured I'd start this one up.
    Getting to the same spot does not mean one has the same journey. Silence!

  15. #14
    P-Funk's Avatar
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    Re: 2004 vs 2006 rear diff.

    How much mileage difference is there? If they are kind of close, get the cheaper one and spend the extra $10k on mods. If the '06 has a lot less miles (half?), I'd go for the '06.

  16. #15
    the blur's Avatar
    the blur is offline Cadillac Owners Enthusiast
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    Re: 2004 vs 2006 rear diff.

    The guy with the 06 won't let me drive it. So obviously I won't buy it. He expects me to hand over money, and be happy after LOOKING at the car. Dealing with morons is just beyond impossible.

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