Originally Posted by Tote
I just went and measured the diff in the XT and its 1350 mm ( 53.25 " )between the bottom of the brake backing plates. As I recall the diff flanges are actually recessed in these plates so that would account for the other 3/4 of an inch. I have always thought that the earlier diffs were narrower. Do you know if the flanges are the same between the early diffs with the 9" style wheel bearings and the later ones with the tapered rollers ? It would be nice to run my brakes on a new diff.
To the best of my knowledge yes. The 9" diffs have a large bearing version and a small bearing version. If I remember correctly? There was two different revisions of bearings on the disc break rears.
Theres also a difference in between a drum rear and a disc rear. There was the small bearing 9" diffs were drum rear and the large roller bearing 9" rear was disc rear. If my memory serves right?
All the brake systems bolt up as the flange is exactly the same, provided your going from drum --> drum or disc --> disc. The only difference I've seen is the actual bearing on the axle itself and thats easily changed.
I have a disc brake 9" myself from an XC. It uses the large roller bearing.
The difference was the small bearing 9" diffs were drum rear and the large roller bearing 9" rear was disc rear.
The disc rears with the large roller bearings are renouned for chewing out axles.
It's been quite a few years since I've worked @ the wreckers I was 18-19 then. I am close enough to 30 now. The last 9" conversion I did was my XB and that was nearly 3 years ago.
Going by what you've said it sounds like you have a drum rear? If yes? Everything will just bolt up. Ford did something right and made things interchangable unlike Holden who changed everything on each model.