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Old 09-16-2008, 04:49 PM
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Join Date: Feb 2008
Location: Northern New York
Vehicle: 2002 Ford F150
Posts: 88
Question Gear interchange question

I'm looking at swapping out my 3.31s for 3.73s. My truck has the 9.75" rear diff. I found some used gears and they're listed as being for a 9.75" diff, but from a F250/F350. Will these gears fit my F150 9.75" diff or are the 9.75"s in the F250s and F350s different? The Ford part number of the gears I'm looking at is 5L3Z-4209-F if that helps. Thanks.
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Jason
2002 F150 XLT 4x4, Single Cab, Short Box, 5.4, CAI w/ K+N, 3" SI/SO Super 44, Cooper ATRs 265-75-16, HID-ish fogs On hold: BFG AT's 265-70-17, OEM posi, 3.73's Someday: tune
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Old 09-16-2008, 04:52 PM
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Join Date: Oct 2005
Location: Concordia, MO
Vehicle: 2003 Ford F150
Posts: 639
Not sure. I would think they are the same. You could call a Ford dealer and ask the parts guy maybe if no one responds.
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2003 Supercrew, 4x4, 5.4L, 6" Fabtech Lift, 3" PA Body Lift, Superchips Tuner, 38x15.50x20 Toyo M/T's, 20x9.5 Procomp 7005's, Yukon 4:88 gears, 40 Series Flowmaster Dumped, 3" AF1 Intake, magnaflow cats
Wish list(in order): Headers(maybe OBX), true duals w/super 44s, ride-rite airbags w/compressor, , SUPERCHARGER!

Thanks for the SIG krusedisc!
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