Thread: 02 Grand Prix Tranny to Bonneville

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  1. #1 02 Grand Prix Tranny to Bonneville 
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    I currently have an 01Bonneville with a bad tranny and an extra transmission from a 02 grand Prix. How difficult would it be to put it in the Bonneville/what would need to be done?

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  2. #2 Re: 02 Grand Prix Tranny to Bonneville 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    "Should" be a direct swap. They both should be 4T65e's and the same gear ratio.

    They are both NA cars right?

    Although the trans mounts might be in a different spot?

    SMGPFC Member #1
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  3. #3 Re: 02 Grand Prix Tranny to Bonneville 
    GXP Level Member 91parkave's Avatar
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    When I took a trans out a 99 bonnevile and put it in my 97 gtp I had no issues the brackets needed will bolt in the back if the trans with no issues.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  4. #4 Re: 02 Grand Prix Tranny to Bonneville 
    Moderator dsmuts's Avatar
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    Don't the bonnevilles have like a 2.86 gear ratio or something
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: 02 Grand Prix Tranny to Bonneville 
    GXP Level Member 91parkave's Avatar
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    best way is to tell by the id tag on the back of the trans
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  6. #6 Re: 02 Grand Prix Tranny to Bonneville 
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    just becareful.....the bonneville HAS to have the webbing in the back of the trans. if it does not have the webbing, yes it will bolt up however you crack the back of the case....

    it has to look like this


    not like this
    2003 SSEi,
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  7. #7 Re: 02 Grand Prix Tranny to Bonneville 
    GTX Level Member nos4blood70's Avatar
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    Bonnevilles have either 2.86 or 3.05 gearing if they're NA.
    -Carl
    "Penelope" - 145k Miles 2003 Bonneville SLE


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