Question about 9 inch rear housing and backing plates... - Vintage Mustang Forums
 
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post #1 of 11 (permalink) Old 03-13-2004, 09:57 AM Thread Starter
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Hi,

I acquired a 9 inch housing for my 65 Mustang. The spring perches are in the correct place, and the length is correct. I think it came from a 57 Ford full size car.

The problem is the diameter and the brake backing plate holes at each end of the housing. The housing diameter doesn't step down near the spring perches, it is fat all the way across. As a result, the housing's backing plate hole pattern is larger than the pattern in my backing plates.

So my question is... Are there any cars that used the 10 inch drum brakes but had the large backing plate pattern?

I could upgrade to 11 inch drums and find backing plates easy for this housing, but... I just bought all new 10 x 2 1/2 inch rear drums and I can't justify buying all new stuff again.

Any help or suggestions will be much appreciated.

Thanks for your time,
John Thomas

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post #2 of 11 (permalink) Old 03-13-2004, 10:25 AM
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I assume that your housing/shaft is ~ 3" in width like the lincoln versailles rear that I have. If this is correct, use your existing plates and have the holes elongated to accommodate the size difference. The ubolts can be found at any napa parts store. Hope this helps.
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post #3 of 11 (permalink) Old 03-13-2004, 10:42 AM Thread Starter
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Actually, I understand I can use the same mounting plates for the leaf springs by elongating the holes.

My problem is with the drum brake backing plates at each end of the axle housing.

Thanks anyway though,
John Thomas




1966 Candy Apple Red Fastback
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post #4 of 11 (permalink) Old 03-13-2004, 10:45 AM
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You might want to look at www.ultrastang.com webs ite about the 9 inch rear ends. Steve had some info about all different kinds of rear ends and drums brake issues there. Hope this works for ya.
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post #5 of 11 (permalink) Old 03-13-2004, 10:46 AM Thread Starter
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I did check that site already, but no luck with my particular question.

Thanks again!
John Thomas


1966 Candy Apple Red Fastback
GT350 clone
Won an Award of Excellence at Nashville's Mustang 40th Anniversary
http://farm2.static.flickr.com/1195/...63e0cd16f5.jpg

1966 Vintage Burgundy Convertible
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post #6 of 11 (permalink) Old 03-13-2004, 11:58 AM
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Measure your axle bearing bore diameter and get back to us....

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post #7 of 11 (permalink) Old 03-13-2004, 12:19 PM Thread Starter
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Hi,

I measured the surfaces in the housing. I couldn't remember exactly how far in the bearings sit, so I measured two areas. The outer most area (where the very end of the housing is) is 2.835 inches and it steps down inside a little deeper to approximately 2.5 inches (my calipers wouldn't get down in there that far for an accurate measurement).

If you need more info or even a picture, let me know.

Thanks for your time,
John Thomas


1966 Candy Apple Red Fastback
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http://farm2.static.flickr.com/1195/...63e0cd16f5.jpg

1966 Vintage Burgundy Convertible
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post #8 of 11 (permalink) Old 03-13-2004, 12:22 PM
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I had a '71 Ranchero with a large bearing 8" rear that I think had 10" drums on the back. IIRC, the late 60s/early 70s Rancheros/Torinos/Cyclones/Fairlanes had the large bearing axles, which I think had the wider bolt pattern? And 10" brakes? If you know of a local wrecking yard with these types of cars you might want to look around and measure. Or maybe someone here knows? Hope this helps, if only a little. . .

Robert
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post #9 of 11 (permalink) Old 03-13-2004, 05:39 PM
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Sounds like it's a big bearing rear. You are trying to put your mustang drums on it and they don't fit, right?
http://ultrastang.com/Rearinfo.asp?Page_ID=1
scroll down to where it says, "IDENTIFYING A LARGE AXLE BEARING HOUSING FROM A MEDIUM BEARING HOUSING: "
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post #10 of 11 (permalink) Old 03-13-2004, 05:43 PM Thread Starter
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Hi,

Thanks for the info. I did see that but, my rear isn't like either pictured. It has the small 3/8 holes, but they have a large pattern like the other rear shown.

Thanks again,
John Thomas


1966 Candy Apple Red Fastback
GT350 clone
Won an Award of Excellence at Nashville's Mustang 40th Anniversary
http://farm2.static.flickr.com/1195/...63e0cd16f5.jpg

1966 Vintage Burgundy Convertible
http://forums.vintage-mustang.com/fi...11-sigpic7.jpg
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post #11 of 11 (permalink) Old 03-15-2004, 12:44 PM
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Sounds like a 57/8 Ford rear, I kind of call them "intermediate" bearing sized housings. I have seen some of the early Bronco's (mainly 72-77) that used 10 X 2 1/2in rear brakes use this pattern backing plate. I might be buying 3 or 4 57/9 axle housings in near future if you don't find anything.
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