This is the rear axle that comes in F450-550s, correct?
Does anyone know the numbers for this?
Would this be a doable swap for a 250-350?
It has a different 8-lug pattern, could one just swap out the parts?
Also, is the Dana 60 in these trucks different from the 250/350s?
Here's a cool swap for a F250: 1978-79 HP Dana 60 front and a rear Dana 135 .
That could be. Maybe they changed it for 2004. Page 255 of my 2003 F250/350/450/550 owner's guide, it says that F350 DRW and F450's use the Dana 80 and the F550's use the 135. You don't happen to have a 2004 manual do you?
fourstroke is right, I've haven't heard of a factory stock single rear wheel F450. Having a single rear wheel F450 would kind of defeat the purpose of having an F450, as 2 wheels are not able to support the weight that the dual wheeled F450 is rated to carry. To my knowlege, both the Dana 80 and Dana S135 are dual wheel rear axles only (except a very rare Dodge Powerwagon Dana 80 front axle from 30+ years ago). Also, it is my understanding that the SuperDuty F250 and F350 4x4's already have a Dana 60 high pinion front axle. '97 and older (starting sometime in the '80's) F250's have the TTB Dana 50 (most F250's from the '70's had Dana 44 front axles) and my '92 F350 has the Dana 60 HP front axle. Correct me if I'm wrong on any of this.
To add: my 2003 Ford Commercial Truck guide lists the F450 and 550 as having 19.5" wheels with an 8.85" 8-lug bolt pattern and F250 and 350 as having 16" wheels with a 6.7" 8-lug bolt pattern (different from earlier F-series 8-lug wheels which were 6.5" bolt circle).
The commercial truck guide lists front axle ratings for 4x4 F350's is 5200 lbs. For 4x4 F450's and 550's it's 6000 lbs. Rear axle ratings for F350SRW's is 6830 lbs. For F350DRW's it's 9750 lbs. F450's are 11000 and F550's are 13500 (Dana S135).
The difference in front axle ratings may be due to the higher rated 19.5" wheels and tires and heavier springs, as I think all the trucks use the Dana 60 front axle, though there could be differences in axle shaft size and spline count, among other things. The difference between the F350DRW and the F450 rear axle ratings may also be due to the 19.5" wheels and tires and heavier springs (not entirely sure what rear axle the F450 is using). I'm not sure on the Dana 80, but on the Dana 70 there are several variations of it for different rear wheel applications and they are not all rated the same, so that could be playing into it here too.
At any rate, to answer the question, will a Dana S135 fit under a Superduty F250-350... There are differences in frame width between pickup trucks and chassis-cabs, which affects placement of the leaf spring pads and shock mounts on the axle tubes and there may also be a difference in rear axle width, as I believe chassis-cabs have a narrower rear track width than pickups, at least that has been the case with other trucks in the past. Leaf spring width and length could also be different on the bigger trucks (not sure) and since you would want the heavier springs to go along with your heavier axle, the spring hangers may need to be replaced or moved to a different spot on the frame. The other differences to consider are the driveshaft, as I imagine the S135 would use larger u-joints and yokes, and also the brake master cylinder, since the rear brakes are likely bigger on the 13500 lb axle and finally, gear ratio, since the F550 is available only with 4.88 or 5.38 gears and 250/350s are available with 3.73, 4.10, and 4.30 gears. Of course one could just change the gears .
I'm sorry when I said magazines, I meant one of the 4x4 magazines (4wheeler or Peterson's, don't remember which).
They were building a new Earthroamer, with cutouts, 37s on custom Alcoas (different 8-lug pattern), and of course that big camper dealie thing.
They showed a picture of the rear axle which was quite clearly SRW. They also said that it was a 450.
Perhaps they did a DRW to SRW swap?
That's a cool-looking axle anyways .
Does anyone know the axleshaft size or anything like that?
Well, you could always put super singles on it (wide rear tires rated at like G or something). Look up super single wheels or super single tires and you'll see what I mean. Usually like, hmmm, 12.5" wide wheels, so something like 22.5x12.5 with a 14.5" wide tire in place of the two dually wheels/tires per side.