2005 Axle Assembly difference?
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5th Wheeling
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2005 Axle Assembly difference?
Fellas- Sorry about this but I'm having trouble finding this info on a forum search:
For 2005, are the rear axle assemblies (Dana 60?) the exact same between an F250 and F350 SRW truck? I know there is a large difference in payload capacity between the two; however, I didn't know if this was solely based on the difference in the springs on the rear and wheels/tires. It looks as though the front axles are identical on the 4X4 versions, and the wheel bolt lug patterns are identical between the two.
If this is so, wouldn't it be possible if one found, say, a good deal on an F250, and wanted to upgrade to F350 specs, it would just be a question of a wheel/tire and spring change?
Again, sorry for what I'm sure is a rehash, but thanks for your responses! -- Russell
For 2005, are the rear axle assemblies (Dana 60?) the exact same between an F250 and F350 SRW truck? I know there is a large difference in payload capacity between the two; however, I didn't know if this was solely based on the difference in the springs on the rear and wheels/tires. It looks as though the front axles are identical on the 4X4 versions, and the wheel bolt lug patterns are identical between the two.
If this is so, wouldn't it be possible if one found, say, a good deal on an F250, and wanted to upgrade to F350 specs, it would just be a question of a wheel/tire and spring change?
Again, sorry for what I'm sure is a rehash, but thanks for your responses! -- Russell
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From: Allen, Tx
The F250 and F350 SRW used to have the exact same rear axle and springs from 1999-2004. Now, (2005-2006) the axle is a bit different internally. (Axle shaft dimensions, bearing diameters and carrier splines.)
The rear axle is still a Ford/Visteon 10.5" full-floating axle but the F250 gets 35 spline 1.50" axle shafts that is rated at 6200 lbs while the F350 SRW gets 37 splines 1.57" axle shafts rated at 7280 lbs. The 2005 - 2006 F350 SRW's Ford Visteon 10.5" FF now has the same axle shafts dimensions as the Dana 80. The 1999-2004 10.5" axle had 35 spline 1.50" axle shafts and was rated at 6830 lbs. (Chassis cabs are yet different... but I'll skip that.)
The only differences between the F250 and F350 used to be the cert. label and the 4x4's spacer blocks that are different; 2" for F250, 4" for F350. Now you have different axle internals too.
There is also a difference in the differential carrier used which is a now function of what engine you have AND what model truck you have; F250 or F350 SRW. The F250 will have the old 35 spline carrier while the F350 SRW will have the 37 spline carrier. There is a 2-pinion carrier and a 3-pinion carrier. (Pinion as in the side gear pinions, not the pinion that rotated the ring gear.) The 5.4L's get the 2-pinion, and the 6.8L V10 and 6.0L diesel get the 3-pinion. In 1999-2004 SD's, all 5.4L and 6.8L reg cabs got the 2-pinion while all others got the 3-pinion.
The bolt pattern is still 8 on 170mm. The F450 and F550 have an 8 on 225mm bolt pattern and Dana 80 and Dana S110 respectively.
The rear axle is still a Ford/Visteon 10.5" full-floating axle but the F250 gets 35 spline 1.50" axle shafts that is rated at 6200 lbs while the F350 SRW gets 37 splines 1.57" axle shafts rated at 7280 lbs. The 2005 - 2006 F350 SRW's Ford Visteon 10.5" FF now has the same axle shafts dimensions as the Dana 80. The 1999-2004 10.5" axle had 35 spline 1.50" axle shafts and was rated at 6830 lbs. (Chassis cabs are yet different... but I'll skip that.)
The only differences between the F250 and F350 used to be the cert. label and the 4x4's spacer blocks that are different; 2" for F250, 4" for F350. Now you have different axle internals too.
There is also a difference in the differential carrier used which is a now function of what engine you have AND what model truck you have; F250 or F350 SRW. The F250 will have the old 35 spline carrier while the F350 SRW will have the 37 spline carrier. There is a 2-pinion carrier and a 3-pinion carrier. (Pinion as in the side gear pinions, not the pinion that rotated the ring gear.) The 5.4L's get the 2-pinion, and the 6.8L V10 and 6.0L diesel get the 3-pinion. In 1999-2004 SD's, all 5.4L and 6.8L reg cabs got the 2-pinion while all others got the 3-pinion.
The bolt pattern is still 8 on 170mm. The F450 and F550 have an 8 on 225mm bolt pattern and Dana 80 and Dana S110 respectively.
Last edited by n578md; Apr 5, 2005 at 02:22 PM.
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