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This is probably an ND question.
I just swapped a '72ish ford 9" under my '66. It fit perfectly. When I took the drums down to have them turned to clean them up, they referenced to a '79. They and the shoes are much beefier than the ones on my dana 44. Are they interchangeable or did someone do something funky?
Thanks
john
This is probably an ND question.
I just swapped a '72ish ford 9" under my '66. It fit perfectly. When I took the drums down to have them turned to clean them up, they referenced to a '79. They and the shoes are much beefier than the ones on my dana 44.
1961/67 F100's have 11" x 1 3/4" rear drum brakes. 1968/79 F100, 1975/96 F150, 1978/96 Bronco & some 1980/83 F100's have 11" x 2 1/4" rear drum brakes.
Some other wierd things with this rear end. The shoes are only 2" wide and when I close things up and tighten up the lug nuts, Everything is bound up tight and won't move. Up until the last 1/6 of an inch things move freely.. Anyone have any ideas what maybe happening?
Thanks.
john
clean all the rust scale off the axle face and the inside drum face, that may cure the bind, if not the drum could be warped. Back off the shoes so they are real loose and see if it turns free. Or you can take the shoes off, tighten the lug nuts on the drum with no wheel and turn it to see if it is true.
If I remember right, the short shoe is installed forward. That looks backwards. The shoe with the thicker lining is the one that does more of the work. It goes to the rear.
I didn't even think about the shoe orientation. They're mounted how they came when I got the axle. I guess P'll be taking things apart AGAIN.
LOL. I do get tired of the springs.
john
In order to change to a wider drum, the corresponding backing plate has to be changed too. The backing plate will have a deeper offset (back towards the center of the rear end housing).
Putting a 2-1/4" wide drum on a backing plate meant for a 1-3/4" wide drum won't work.
ultraranger is dead on. Even though those 68-72 housings will bolt right on there are a bunch of differences in them. The housings are narrower flange to flange, the bearing sits on the axle at a different location than the 65-66, and the backing plates are different. You need to check casting numbers and make sure all that stuff matches. My truck came with a 9 inch from a 68. The PO didn't know that and put 1 3/4 inch shoes on it. I suppose they worked a little but the mismatch had destroyed the backing plates.
ultraranger is dead on. Even though those 68-72 housings will bolt right on there are a bunch of differences in them. The housings are narrower flange to flange, the bearing sits on the axle at a different location than the 65-66 and the backing plates are different.
9" axle shaft is the same 1957/67 F100: B7TZ-4234-A
9" axle shaft is the same 1957/67 F100: B7TZ-4234-A
That kinda basically what I said. I was pointing out since he said he had a 72 ish housing that they are not the same as the ones in our trucks other than sharing the same differential.
I guess P'll be taking things apart AGAIN. LOL. I do get tired of the springs.
john
While a well worn flat blade screwdriver with a notch in the end works, I bought a pair of brake spring pliers just to see how they worked. Lots of people try to use them as stretchers, that won't work. They make a cool sound installing them.. "Pop .. pop.. pop.. Ka-Sproing"
Yeah I'm easy to please. Joe Motohead showed me how:
and the backing plates are different.