Quote: interesting looks like ford used the dana in 3/4 ton trucks and bigger up to 4 tons. so why did they do that if the 9 nich is so great and they used them in 1/2 ton trucks and broncos?
Because the axle tubes would bend.. just like the 8 3/4
The two 9" that I broke both broke around the rear support bearing. Only bent one housing and it started collapsing where the spring perches were welded on. I don't recall the axles being any trouble to get out though. These were in a 79 four wheel drive with a 400, four speed and 32-10.5 tires.
