Superduty Axle Codes
F350 duallys 61 - open - 3.73 62 - open - 4.10 63 - open - 4.30 F1 - Limited slip - 3.73 F2 - Limited slip - 4.10 F3 - Limited slip - 4.30 F350 SRW 41 - open - 3.73 42 - open - 4.10 43 - open - 4.30 D1 - L/S - 3.73 D2 - L/S - 4.10 D3 - L/S - 4.30 F250 & Excursion 31 - open - 3.73 32 - open - 4.10 33 - open -4.30 C1 - L/S - 3.73 C2 - L/S - 4.10 C3 - L/S - 4.30 My early '99 has C1 listed on the door plate. |
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