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Type: Posts; User: Cdb98

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    Thank you

    Thank you
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    412

    3.42 to 3.73 gear swap 2003 silverado

    Swapping my 3.42 rearend for a 3.73 rearend what all do I need to change in my tune? Truck is a 2003 with 5.3 and 4l60e
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