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The Allison Torque Converter Hardware is associated with the TC221 torque converter assembly used across Allison 1000, 2000, 2200, 2400, and 2500 series transmissions. Across those five series, the shared TC221 converter family provides broad application coverage without making the hardware universal to Allison transmissions. Its use stays tied to TC221 assembly work across those named series. For shops servicing several related platforms, the TC221 designation makes the Allison 29546576 easier to connect with the correct converter service context.
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