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6.72:1 gears thats it. here a link to get them it depends on if you get the 2 1/2 ton or the 5 ton you gotta do a big lift to get it done. I have heard it tough. http://www.boyceequipment.com/
Got to be running a BIG tire to justify then on a street driven rig. I don't remember the width they come but I know Boyce and one of the other bigwig Rockwell dealers will shorthen them for you (for a fee of course). The toploader design means you need a good amount of lift to make them work and I believe weight wise you're looking at around 650-700 for the front and somewhere between 500-600 for the rear.
I wouldn't say that sticking them under an F350 would be too diffucult, it's just all the little stuff that goes along with it like the lift, steering and expense of properly equipped Rockwells.
Yeah, for street driving (legally) you cant have just a pinion brake, so the disc brakes would be the bad part, cost wise (1500 on 6x6 USA). I think Id be able to adapt and fab a lot of the steering and stuff.
Well, guess Id have to run 53" michies, find some wierd tranny, or invent the 3 speed transfer case - low, high, and super-high.
For the Michies, it wouldnd be clearing the axle, it would be the tires.
I did a lot of research on the rockwells. Here is what I found out:
approx. 800lbs apiece.
Disc brakes are approx. 1500.00 a piece. Although they do come with drums from most places.
6.72:1 is the only gear choice.
Detroit lockers approc. 600.00 a pece.
Some people use tie rod and draglink steering setups. But Hydro is recommended.
You need alot of lift. I could not get anyone to give a exact amount. Probly because it varies from truck to truck.
Ended up with a Sterling 10.25 LS Full Float and a D60 HP. 900.00 for both in good working condition. We'll see how they hold up with 46" Baja Claws.
I am doing the 4 wheel disk brakes on a set of axles right now it can be done for way less than $1500 I got the rotors for $100 each and $100 to machine all four rotors and hubs, I am using the stock calipers off my superduty. The USA6x6 uses superduty front calipers. My setup will be like their older kit where the caliper bracket has to be welded on not the new bolt on kit. It uses all custom rotors made for them only i belive. So it cost me $500 for 4wheel discs. Randy the detroit lockers are $415 shipped from usa6x6
Last edited by jesse460; Nov 23, 2004 at 09:58 PM.
The 800 pounds each is for the front axle with drums so keep in mind you'll drop about 100 pounds off that by going to discs. In terms of lift I'd say you should be looking at a MINIMUM of 12" but like Randy says this depends on the rig. I'm at almost 12" of lift right now and I would be a little worried about top clearance for a Rockwell axle on the front of my rig. You could mall crawl it but the first good bump you hit and it'll be into your crossmember or oilpan. Then again if you're running 53's you'll need a bit more than 12" already.
Jesse, if you can why don't you snap some pics as you put the disc brake setup together? I'd really like to see that and think it would be cool if you could assemble the whole thing yourself for only few hundred dollars.
Rumor has it there's going to be a selectable locker for the Rockwell. I can't wait to see what happens with it.
The first of the year i am going to do the install on my superduty, ill be sure to take pics of everything. I'll also get the part numbers off the rotors, The local brake and clutch shop keeps them in stock so they have to be a fairly common application. I am going to put detroits front and rear eventually, cant afford them right now, but i am doing 4 wheel steer.
Last edited by jesse460; Nov 24, 2004 at 12:46 AM.
You using a self centering ram in the rear? Electric pump back there? I've really been wanting to do this but there's just more involved than I have the time and money for now plus I wouldn't be able to drive something that big on the streets of Washington.
yeah I am going with an electric pump and self centering ram. hydro assist up front, rear four linked, front 5 linked, triple conveluted air bags with 12 inches of travel and internal bumpstops. and 54x24 bridgestone tires. It will be street legal in texas, and I will still be able to use it to haul my jeep. I bought all the parts for my old f150 but I messed up my back and had to have surgery so all the money I had saved to put into the f150 went towards back surgery, since I am self employed and have no insurance. So I have decided to sell the f150 and use the proceeds to pay for the superduty build up.
That will be hella cool. Too bad our state laws are not so lax. I've got to do all kinds of stupid stuff to my truck just to be able to get it in the street with 44's.
How does that 5 linked setup work? Is it a 4 link with a trac/panhard bar or what?
The air bags is something I've been looking at a little bit recently. I had never thought about it until about a month ago when I saw a killer build with them on all 4 corners. Apparently you DO want to use a swaybar with them though or you're likely to end up on your lid.
Sucks big time about the back. I'm in the same boat right now but can't afford surgery and really don't want to have it. Looks like I'll be on a decent insurance program soon though incase it finally snaps.
The 5 link is just a non opposing 4 link with a track bar. I have some sway bars from speedway engineering that i am gonna use. And just to add the required bling I have 8 of the fast acting parker valves so I will be able to control each corner seprately. Back problems definatly suck I had a very badly herniated disc that was hitting my sciatic nerve, had it for over a year before i finally saved the money for surgery.
jesse- what had to be machined on the hubs and rotors??? I have some of the "other" style 2 1/2 axles that can't be easily equipped with a pinion brake (wouldnt want to anyway) When the time comes to do something with them I thought I would call a big truck junkyard to see if there was a suitable rotor available and make my own caliper brackets. Maybe your setup will work for me too.
the I.D. of the hole in the center of the rotor had to be opened up and the O.D. of the hub was turned down some the smaller part,not the wheel mounting flange. If you go to a junkyard looking for the rotors look at the box van things like UPS uses they have the rotors on the front.