Late model Ford CD4E torque converters manufactured by LuK have a slightly larger impeller hub bore than earlier model units, which use Sonnax bushing FD-B-4. Sonnax precision bushing FD-B-11 is designed specifically for the later LuK converter impeller hub. Note that FD-B-11 will fit only the OE impeller hub and not the Sonnax FD-90-25G replacement hub (FD-B-4 can be used with these hubs).

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