Thread: Cadillac trans swap?

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  1. #1 Cadillac trans swap? 
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    has anybody ever heard of swapping out the 4t65e hd trans for an eldorado trans? the 4t80e or whatever it is. somebody told me that it would be a good swap cuz those ransmissions are very strong but u have to cut the harness and do some other modifications to make it fit. anybody know anything about this?
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  2. #2 Re: Cadillac trans swap? 
    Donating Users 16MustangVet's Avatar
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    The gearing is what you need to be concerned about so your pcm will cooperate with the 4t80e. I dont know what else would need to be done. Im wondering how I could get a 4t580e in my 02 GP GT as well or if its even worth it.
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  3. #3 Re: Cadillac trans swap? 
    GTP Level Member QwikGT's Avatar
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    just have trannyman build you a 4T65e
    he built mine!
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  4. #4 Re: Cadillac trans swap? 
    GrandPrix Junkie Sabrewings's Avatar
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    It's probably way more trouble than its worth. Not to mention the 4T80E is horribly heavy.
    2004 Impala LS - got some mods sold!!!
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    NAIOA moderator Still Imp'n, just in a different Imp.
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  5. #5 Re: Cadillac trans swap? 
    Donating Users 16MustangVet's Avatar
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    Wikipedia says its 60lbs heavier than a comparable 4t65e or 4t60e and i cant find a gear ratio that will work. guess that counts it out.
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