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    • Sonnax's Big Shaft System

    Sonnax's Big Shaft System for GM Powerglide automatic transmissions: 27 parts from Sonnax and other makers.

    Narrow it down: 1.58 Ratio, 1.65 Ratio, 1.69 Ratio, 1.80 Ratio.

    Every product page shows the live stock count from our warehouse. In-stock orders placed by 3 PM Eastern, Monday to Friday, ship the same day, and orders over $35 ship free within the contiguous US.

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