Why do we need to swap the rear Axle? I would like to know the WMS difference is anyone has it? and i see the brakes are larger..


found this- the pinion spline count is different starting in 2011. I believe axle shafts are still 35 spline though
Ford 10.25" / Ford 10.5" (Sterling / Visteon) Axle Parts, Gears, and UpgradesAxle Specifications:Ring Gear Diameter:10.250 / 10.500Diff Cover Bolts:12Ring Gear Bolts:12Axle Spline Count:35Axle Shaft Style:Full & Semi-FloatC-Clips:NoPinion Support:NoPinion Nut:1-1/8"Pinion Crush Sleeve:YesCarrier Breaks:NoDropout Carrier:NoOil Capacity:3.5 qt. / Fill to PlugOil Type:75W-140 SyntheticMax Output Torque:8,300 / 10,660 ft-lbsMax Cont. Torque:2,000 / 2,900 ft-lbs

Torque Specifications:Pinion Preload New:20 to 35 in-lbsPinion Preload Reused:6 to 8 in-lbsRing Gear Backlash:.006" to .010"Ring Gear Bolt Torque5 ft-lbsCarrier Bearing Caps:80 ft-lbs
Popular Applications:Ford E-250 / E-5501985 - 2011RearFord F-1502000 - 2010RearFord F-250 (Super Duty)1985 - 2011RearFord F-350 (Super Duty)1985 - 2011RearFord Excursion2000 - 2005Rear

Axle Images:

Changes By Year:1983-199210.25" Short 31 Spline Pinion (1-1/4")1993-199810.25" Long 31 Spline Pinion (1-5/8")1999-200710.50" Long 31 Spline Pinion2008-2010Same as '99-'06 w/ Different Bearings2011 +10.50 w/ 37 Spline Pinion

Pinion Bearing Changes By Year:1983-1997Inner:HM807010 / HM8070441998-2007Inner:NP949481 / NP5044932008-2010Inner:NP998236 / NP7612712011-2016Inner:
Outer:Koyo 106102
M802047 / M802011

 

Are you asking why the need to swap if you swap the front?

 

yes, thanks. From what I have read from other sources they were saying the front dana 60 (05' and later are wider) but the rear sterling axles are similar widths..... I cannot confirm this however....
I understand the rear caliper is slightly larger but any other reason to swap rear axles? Thanks

 

The newer axles on the 05+ are 3" wider from end-to-end...both front and rear. Hence the need for spacers if you want to run the same rims on the back as the front if you DON'T swap the back axle out with the front. You can get a Dana 60 from an 03-04 that is still leaf sprung if all you want is the 60.

 

 

 

I've briefly considered going this route... boring out the plug welds that retain the axle tubes to the front differential casting, and replacing the tubes with longer ones, just a couple of inches longer, matching whatever was available in off the shelf axle shafts that matched my carrier's splines, in order to widen the track and increase the wheel cut clearance for a tighter turning radius, while avoiding the death wobble and inadequate caster issues prevalent in the coil sprung set ups since the whole purpose of doing it this way would be to retain the leaf spring suspension. While shaving down the stop posts of the knuckle castings for more angular cut is easy enough, the more complicated limitation lies in the universal joints nested inside the knuckles. The stock U joint crosses and axle shaft yokes are apparently not large enough to reliably handle any increase in range of articulation.

So when Dana designed the Super 60, larger yokes and larger U joints were employed inside larger knuckle castings, to accommodate the more angular wheel cut during axle rotation at 4HI speeds. That's when I realized that my experience helping a rock crawler neighbor plug weld new tubes in the pumpkin of his buddy's rear axle D60... was not enough to street cred to napkin engineer a wide track front axle on my own.

 

I was under the impression the rear axle width difference was in the hubs, everything else being the same. Swapping the 05-07 hubs and brakes over would be doable, but I guess that depends on if the caliper spacing is done from the mounts on the axle, or the calipers & brackets.

 

Well, just looking at some of the 05+ axle pics, it looks to me like narrowing them is out due to the bottom coil spring locator which would need to stay in the same place.

 

 

 

 

Perhaps I worded it wrong. I'm talking other way around. put the 05-07 hubs & brakes on the 01 rear I already have. Save from pulling out the entire axle. Front axle would be a full swap of course, but from what I can tell the rear upgrade should be much easier. I could be entirely wrong. Axle shafts in the 10.5 rear are the same 35 spline 37 5/8" aint they?

 

My truck came with the 6K lb rated Dana 60. I'm wanting the wheel cut and turning radius of the Super 60, without converting to coils and radius arms.

 

the coils is what makes it able to have a sharper turning radius, if you keep the leafs you will never have that.