Rear Axle Swap Questions

[Gump1986]

I have two Powerstroke trucks, a 1995 Dually and a 1996 F250. The F250 has 3.55 rear gears, and the Dually has 4.10s.

I am wanting to swap the F250 axle assembly into the dually to get 3.55 gears (I do almost all highway driving).

Can I directly swap these axles with no problems?

[lifewitlooie]

I don't see why not. Position of the center bolt is the same distance I think.
If the centerbolts are the same distance I don't see why It wouldn't switch right over

[Gump1986]

Wow that would be awesome if they will.

I was fairly sure that the spring pads and shock mounts would have to be in the same place, but I wasn't sure if the overall axle was narrower or wider with one being a F250 and one being a dually.

If everything will bolt up with no problems, is there any easy way to recalibrate my speedometer for the new gearing?

[bigwhite7.3stroker]

The swap will work but the dually hubs will need to be put on the 250 axle b/c the studs are longer for the dual rear wheels and you will need new u-bolts

[pitsingerk]

I'd double check the dimension between the backing plates. even though the spring perches are at the same dimension, the the dually rearend is four or five inches wider. If they were the same, I'd already have the 3:55 rear in my truck. I'm waiting for time to take the truck down to swap the center section.

[metallitera]

so this is a no go? looking to do the same.

well were there any OBS duallys with higher gears or did they ONLY come with 4.10's?

[pitsingerk]

I've looked on CAR-PARTS.COM and found 3.55 geared rearends, very expensive though.