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Old 07-05-2004, 04:42   #1 (permalink)
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9" diff lenghts

I recently swapped my disc brake 9" for a drum brake 9", cause everyone I asked said they were about an inch shorter. It turned out it wasn't shorter but longer. It was supposed to be an xw-y diff but now I aint so sure. What I'm after is some info on 9" diff lengths, as I need one an inch shorter than the disc brake model. Maybe it wasn't a xw-y one but a F100 or Galaxie one, are they longer?
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Old 07-05-2004, 05:05   #2 (permalink)
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Re: 9" diff lenghts

From memory xw-y 9inch diff are 1 inch shorter each side than xa-b-c 9 inch diff. Same mounting points. You may have a xa-b drum brake 9inch. F100 9inch diff have a bracket attached on each side on the axle housing, just in from spring mounting.This is for shock to attach to.
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Old 07-05-2004, 21:30   #3 (permalink)
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Re: 9" diff lenghts

Thats exactly whats happened, you swapped a disc XW-XY diff for a drum XA-XB-XC diff. Your old one is worth a bit, but this new one you have now is easy to get.
The diff sizes are the same in each model between disc and drum.
If you want it shorter than XW-XY length then you must customise.
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Old 07-07-2004, 00:53   #4 (permalink)
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Re: 9" diff lenghts

aren't all xw-y 9 inch diffs drum brake. I thought even xa gt's had drums and the discs only came out on xb-c's. Didn't Know you could get a drum 9" from xb-c. At least I know what a F100 one looks like now. What length is xw-y drum? or the shortest one you can get.

Last edited by buzz; 07-07-2004 at 01:01. Reason: one more question
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Old 07-09-2004, 05:12   #5 (permalink)
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Re: 9" diff lenghts

XY only in drum brake setup. Probably easier if your after a specific length to get your original one shortened. Had my disc rear shortened and all they did was rotate the axle tubes slightly so the disc calipers would clear springs etc.
XY were 1 1/2 shorter overall than XA on if memory serves
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Old 07-09-2004, 05:54   #6 (permalink)
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Re: 9" diff lenghts

XA-XC are 1540mm flange to flange.

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Old 07-15-2004, 21:53   #7 (permalink)
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Re: 9" diff lenghts

And that would Make an XY 1500... given the dimensional difference is 40mm (? can anyone confirm ?)
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Old 07-17-2004, 06:13   #8 (permalink)
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Re: 9" diff lenghts

X,Y. overall.......59.5 inches ( 1511 mm ) short axle 27" long axle 31"

X.A. ( DRUM ) 61.5 '' (1562 MM ) " 28'' '' 32"
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Old 07-18-2004, 00:03   #9 (permalink)
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Re: 9" diff lenghts

Is that across the axle flanges or across the drums??
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Old 07-18-2004, 03:57   #10 (permalink)
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Re: 9" diff lenghts

axle to axle , ....add 1/4 inch or 6mm for brake drums .
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