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MMcGuire617 03-05-2012 08:12 PM

F350 axles in Jeep?
I can get a good deal on '84 F350 axles, Can i fit them in my 03 wrangler x. I know you can stick them in a YJ but I'm just wondering if its possible to stick one in to replace my D35

UnlimitedLJ04 03-05-2012 09:24 PM

Sure, you just need to do all the fabrication & rework necessary:
  • cut all the Ford brackets off, weld on new TJ brackets
  • brackets need to be in correct place for caster, pinion angle, arm geometry, and more...
  • EDIT: it's a TTB front end, so you can't use the front axle..
  • readjust bumpstop extensions
  • possibly relocate or modify the gas tank to clear the larger diff pumpkin
  • change wheels to new bolt pattern
  • figure out the brake lines and e-brake
  • possibly change the master cylinder to power the larger brakes (ask "Black Magic Brakes" for advice on this)
  • Most folks running these types of 1-ton axles are running ~40" tires, with little TJ body left, full roll cage, coil-overs, fuel cell in the tub...think rock crawler competition buggies.
  • probably more i'm forgetting....
Head over to Pirate4x4 for write-ups on using those axles.

Here's a good build to give you an idea:

rda616 03-05-2012 09:40 PM

4 Attachment(s)
If it's a 84 it's a ttb front. Ford reintroduced the hp60 in 85 85-91.5 are the same and have a very small area to work with on the driver side due to such a small section of axle tube. The 77.5-79 is a better choice for a tj.

The rear is a 60 . But if I was going thru all the trouble of getting one ton axles under a jeep I would use a much stronger ford 10.25 rear. They have better ground clearance then a 14 bolt and bigger shafts as well.

Ibuildembig 03-05-2012 09:41 PM

^^^couldn't have said it better myself :)

MMcGuire617 03-05-2012 10:05 PM

should i do both or one

rda616 03-05-2012 10:09 PM

4 Attachment(s)
The full size axles are about 69" wide the stock tj axles are about 60.5" wide. It would look a bit funny with mismatched axles.

Ibuildembig 03-05-2012 11:03 PM

And mismatched wheels

DevilDogDoc 03-05-2012 11:08 PM

I always thought that the HD fords all ran leaves up front, the 150's had the TTB.

Ibuildembig 03-05-2012 11:10 PM

Nope 80-84 F250 and F350 had them and 85-97 F250's did too all running leafs. The only way a straight axle was available after 84 was in the F350 and only kingpin till 91.

DevilDogDoc 03-05-2012 11:35 PM

So it is TTB or leaves?

Ibuildembig 03-05-2012 11:37 PM

The TTB isn't springs, its twin traction beams. Basically two arms that go from side to side and have a pivot. They can either have leafs on top of them or coils.

DevilDogDoc 03-05-2012 11:40 PM

Oh I know what the arms are, I didn't know that they used them with leaves also. All the ones I had seen ran with coils and the few 250-350's I looked at had the leaf setup, didnt look close enough to see the TTB on there I guess. Thanks for the info!

Ibuildembig 03-05-2012 11:42 PM

Anytime, if it was light out I'd snap a pic for ya as I have one out in my driveway right now lol

DevilDogDoc 03-05-2012 11:44 PM


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