10 inch drum brake fitment question.... Reply #15 – February 23, 2014, 10:45:48 PM Quote from: OfficerJoseph;429406I would imagine then, that if you used Bird axles in the TC/Mustang rear that the drums would be sticking too far out and not mate up with the backing plates...Hmmm, maybe you're onto something; when i did mine, I had put a small flat washer on every lug stud on one side (or the other, can't remember which, exactly) because the drum contacted the backing plate just enough to cause a noise. I'll have to mock the setup on the Mustang rear i have in my shop, using a TC axle, a Sport back plate and drum, and see for myself if you're concerns are warranted. Somewhere there's a different number, and I'm not sure if it's in the depth of the Crown Vic drum I have, the Sport's original drum, or there's a mistake on a measurement on that chart. I'll look for the chart here, and link you to it so you can compare too. Quote Selected
10 inch drum brake fitment question.... Reply #16 – February 24, 2014, 08:16:50 AM TC 8.8 axles are 30" EXACTLY. So 30 X2 =60 + app 3/4 for the cross shaft in the housing gives you app 60 3/4" drum to drum on a TC!!! Quote Selected
10 inch drum brake fitment question.... Reply #17 – February 25, 2014, 12:36:37 PM Just curious as to why it would have to be 83-85 specific backing plates? The plate ITSELF is actually different as well?My "lowly" 7.5 has the 10 inch drums straight from the factory. I'm actually quite glad it does. They're a good match to 11 inch brakes up front with the 73 mm caliper. Quote Selected
10 inch drum brake fitment question.... Reply #18 – February 25, 2014, 01:30:57 PM The drum hats are different on some 9" drums. one syard I occasionally go to keeps drums on a shelf from every car with notes what they are off of. ill have to see if I can get up there and see if they still have them. one had a really deep hat ontop and said 84 tbird on it. Quote Selected
10 inch drum brake fitment question.... Reply #19 – February 25, 2014, 01:47:22 PM No, I mean the 10's. Post #8 in this thread caught my attention concerning this..... Quote Selected
10 inch drum brake fitment question.... Reply #20 – February 25, 2014, 05:58:22 PM Well, Paul, the axle lengths are the same, and the rear housing widths are different between the affected years, and with the brake drums possibly being the same throughout, that means (to MY thinking, anyway) that the backing plates would thus be of a different offset.I suppose I should compare part numbers of the brake drums of the '83-'85 cars vs. the '86-'88 models before taking that as solid though. Stay tuned...OK, so I compared the brake drums via oreilly's website...they're identical for both '84 AND '88, in regards to 10" rear. So since the overall housing length is a bit wider on the older years, it stands to reason that their backing plates would be different (with less "offset") than the '86-'88 year's backing plates, would be a little "deeper" to make up for the narrower housing, but yet the -to- width is the same throughout all years.Does this sound accurate to you guys?The sure way to know would be to physically compare the backing plates from the narrow '88 rear against the wider '84 rear. Unfortunately, I have no idea where to locate such an animal, as the backing plates aren't sold by parts stores.If there is indeed a difference, you would HAVE to use the older back plates to do the 10" conversion on an 8.8 WITH 4 lug, but you HAVE to use the 1988 10" backing plates if you do this swap using an 8.8 and going to 5 lug, as I did.And Vinnie, I'm sorry for wrecking your post...:D Quote Selected
10 inch drum brake fitment question.... Reply #21 – February 25, 2014, 06:14:02 PM Ford: Reinventing the wheel all throughout the '80's..... Quote Selected
10 inch drum brake fitment question.... Reply #22 – February 25, 2014, 06:20:52 PM I'm having a hell of time trying to find an image of an '84 backing plate to compare to the '88's b. plate...maddening, to put it simply.. Quote Selected
10 inch drum brake fitment question.... Reply #23 – March 23, 2014, 10:56:21 AM I can snap a pic of my backing plate when the car comes back from paint.... Quote Selected
10 inch drum brake fitment question.... Reply #24 – March 23, 2014, 02:21:00 PM I just rebuilt what I had from scratch. Had to get it done. Keeping the drum brakes I have until I can find another turbo coupe set up in complete form then I'll go to discs. Quote Selected
Topic: 10 inch drum brake fitment question.... (Read 4345 times)
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