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.
03-05-2012 09:41 PM
^^^couldn't have said it better myself :)
03-05-2012 10:05 PM
should i do both or one
03-05-2012 10:09 PM
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.
03-05-2012 11:03 PM
And mismatched wheels
03-05-2012 11:08 PM
I always thought that the HD fords all ran leaves up front, the 150's had the TTB.
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.
03-05-2012 11:35 PM
So it is TTB or leaves?
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.
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!
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