It's somewhat close but I know more people who's destroyed a 9".. 3 times in one day.. than I do with 60s.
Also, 9"ers like to leak from axle seals. New seals leak.. Putting RTV on the flanges, still leaks.. Putting new seals and RTVing the flanges, still leak.. New seals, RTV, and flange seals and it usually still leaks. Usually the leaks occur within the same day to a few months depending on your method of a fix..
Now, I know of a couple who haven't had any problems, but you still have to deal with the press on bearings whenever the time comes, kinda fun when you don't have a press..
Personally, I'd go with a 60. They're the same price anyway. May be a bit bigger, but deffinately easier to deal with.
A big consideration in a 9" vs D60 debate is pinion location.
"Si Vis Pacem Para Bellum"
"Great danger lies in the notion that we can reason with evil"
...We use words like honor, code, loyalty. We use these words as the backbone of a life spent defending something. ...I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the blanket of the very freedom that I provide, then questions the manner in which I provide it. I would rather you just said thank you, and went on your way, Otherwise, I suggest you pick up a weapon, and stand a post...
I bought the HI-WAY BLASTER HORN that's 139dB and every time I honk the horn an Angel dies.
16 - He causes all, both small and great, rich and poor, free and slave, to receive a mark on their right hand or on their foreheads,
17 - and that no one may buy or sell except one who has the mark or the name of the beast, or the number of his name.
18 - Here is wisdom. Let him who has understanding calculate the number of the beast, for it is the number of a man: (Real ID and RFID chips)
Think about it...
Well, I just put this on another thread about a day ago: close to 500K on my dana ft and ford 9' on an f-150. I dread saying it-- but it went for at LEAST 200,000 miles before its first fluid change. Has seen a LOT of off road and Highway miles...not too many in city and they've held up well, but figuring the 9" in the back "runs" all the time and the front one only off road--> I think I'd say a 9" hands down.
The only trail that sucks is the one you haven't been on yet.
If it aint related to God, guns, women, wheelin, or music then it aint worth much talking about it is it?
I really think a 9" as a builder axle. Can it be way stronger than a D44, of course. Can it be weaker in some cases, yes!. Really it depends on which ford 9" you get. If you have a non-nodular iron 3rd members, you can blow the third member apart with as little as 31" tires and lockers. It can be an easy fix though with just picking the right 9" from the bone yard. And really the stock 31" spline really aren't the strongest either. The stamped steel housing really can flex alot.
With that being said, I would love to have a trussed 9" stuffed with a truehi9 third member, a 35" spline locker, and 35 spline alloys.