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Old 12-10-2017, 12:40 PM   #1
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Axle and ratio chart

I have been trying to decode the ratio and axle. Some charts say different thing. What do i have? Thanks
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Old 12-10-2017, 02:23 PM   #2
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From what I can find, the top one (C4) should be a Dana 60 with 3.73 with a limited slip. The bottom one (C2) should be a Dana 60 with 3.00 (never new that was available?) with limited slip. Are you junk yard searching, or do you have 2 vans?
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Old 12-10-2017, 03:25 PM   #3
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Whenever you see a letter in the axle code, it designates it as a limited slip. When the code is 2 numbers, it is an open diff.
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Old 12-10-2017, 03:34 PM   #4
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The C4 is one i think i am buying the C2 is back up plan. Thanks fo ansewer. My current van has 7 and axle 34 i am hoping the 3.73 are same as current van. Thanks
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Old 12-10-2017, 03:54 PM   #5
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Great info . Do you know what the 34 is?
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Old 12-10-2017, 04:00 PM   #6
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I got my info from here: https://www.ford-trucks.com/forums/2...tio-codes.html
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Old 12-11-2017, 04:06 AM   #7
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Slightly off topic but since we're already talkin' 'bout rear axles.....

Are the threaded axle vent tube fittings generic to Dana's (mine = 34) or super specific to the exact axle assembly?

I need to raise my left side brake lines slightly to clear a new U-bolt installed for a Hellwig rear sway bar.
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