Compression Ignition Addict
Join Date: Nov 2012
Location: las vegas, nv
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The F350 has 2 more splines on the axle shafts ( 37 vs 35) and the axle shaft itself is slight larger in diameter. As mention you get the extra leaf spring and in 2011 the Hydroboost Brakes. (the duallys still get the Hydroboost, but the SRW all get the Vacuum boost since 2012).
The F250 rear axle is rated at 6200 lbs
The F350 rear axle is rated at 7281 lbs
Axle Shaft Spline Minor Dia 1.36" 1.50"
Axle Shaft Spline Major Dia 1.50" 1.57"
No of Splines ( Hub end) 35 37
Go order some gears for a 2012 f250, you'll be surprised..
2012 F250 CCSB 6.7 (3.73 gears) H&S Minimaxx (My own tuning), H&S 64mm turbo kit, H&S Dual Fueler, H&S Low Pressure Fuel System, H&S CCV delete, No Limit s2 Intake, PMF 3-link, PMF traction bars, Fox 2.0s, Icon 2.5" coils, Platinum 20s w/ 295/65 toyo at2s, Airlift bags and wireless controller, TFI 50gal, rollX, AMPboards,