I just measured a set of 1.75 back plates when laid flat they measure 1 1/4 inch to the bearing face I just measured a set of 2.5'' back plates and when layed flat they measure 1.5'' to the bearing face I am going to ***ume that a 10 by 2'' back plate when laid flat has a measurement of 1 and 3/8'' to bearing face searching on-line all 3 have different Bendix part numbers 1.75 is 319480/1 2'' is 317558/9 2.5 - I ***ume from mine is 321095 - although the partnumber is FOVY -1990 lincoln I just tried a set of new 2'' shoes onto a 2.5'' back plate and they do NOT fit, they do not lay flat at the pivot boss - they need the extra 1/4 inch to make them sit nice. next, flange offset relating to backplate position's - this is puzzling me the 1.75 backplate has a drum total height of 3.29 inches - 76 maverick I can't do fractions so metric conversion is 31.75mmmm deep backplate - 83.56mm drum = 51.81 bearing to flange the 2'' backplate has a drum total height of 3.46 - 76 mercury monarch 35mm deep backplate 87mm drum = 37.08 = 52mm bearing to flange the 2.5'' backplate has a drum total of 3.74 - 1990 Lincoln town car 38mm deep backplate 94.9mm drum = 56.9mm bearing to flange so to conclude, the 2.5 drum with 1990 backplate and drum STILL may not work as it will clash 5mm . ****** so the 8.8 axle in a 1990 Lincoln has a 5mm wider flange offset than a small bearing 8/9'' ford even though thedrum has a friction surface of 2.98, i'd have to cut 5mm off the back of the drum. **** I give up
A lot of older Ford models used those 10 x 2 1/2 brakes in the rear. I'm running them with Fairlane wagon rear drums, I thought the Lincoln drums would fit also, the axle offset is 2.5. Read this article long time ago ( http://mustangsandmore.com/ubb/RearBrakesbySamGriffith.html ) theres more but couldn't find it another drum example is ( http://www.rockauto.com/en/catalog/ford,1972,ranchero,7.0l+429cid+v8,1136034,brake/wheel+hub,drum,1744?a=Referer+www.google.com+URL+/ ) I thought the register diameter is what you need to watch out for, small register axle = small register drum. If you have large register drums on small register axles you can buy or make spacers; ( http://www.currieenterprises.com/register-adapters-brakes ) Don't give up, it sounds like you're close! I'm sure others will chime in also...
Hello, I now think I will run the 2.5'' shoe, so need. 3.46'' tall drum, with the 2.8 bore 4.5pcd, but that has a friction surface that can take the 2.5 shoe, the mercury monarch is only 2.35 friction. so.... 91-94 ford explorer http://dgzmd7u6z2by7.cloudfront.net/partimage/BDS/1ABDS00033/large.JPG https://www.rockauto.com/info/142/CE_12365037_Dra.jpg https://www.rockauto.com/en/catalog...el+hub,drum,1744?a=Referer+www.bing.com+URL+/ these the correct brake shoe https://www.rockauto.com/en/catalog...,brake+shoe,1688?a=Referer+www.bing.com+URL+/
This is dimensions for the 72 drum I listed, taller because it goes over rear edge of backing plate and is finned. This is the one you posted, see it stops at the backing plate. and it looks flatter on bolt face? Will that keep it from touching the backing plate? The Econoline drums are like that also. The hub register being different by such a small amount? What year are your axles? I would recommend the axles and drums match in the center register hole. Also wheel stud sizes, Explorers 1/2", the early one above is 7/16" This is the 67 Econoline drum, smaller hub register.
aha! the .61 bolt size is no good, as if you look at the pic, I know the larger studs don't fit - so it has to be the smaller size 1/2'' unc threads the hub register has to be 2.777 ithink 2.70 or70.6mm and 71.10 - whats .2 of a mm, might be an error in measuring
The axle can be drilled for 7/16 studs, if the other drums fit better. They press in also. The center sounds like 2.78, Is your rear out of a Maverick?
yes its maverick shafts in a narrowed mustang 9'' small bearing case I had a pair of earlier ones too and sold them not realising the centre was larger on these!!! ha ha ha I just bought new wheel studs, so won't be changing them I shall just buy all new explorer stuff, its cheap enough. my onmly fear is that 10 by 2.5 is too much brakes on a lightweight 32 ford pick up I think I have an odd one
They should be fine, you can change wheel cylinder size later if needed. (to reduce pressure) You can also check out early 80's ltd and arrowstar vans for drums. The larger center is more common nowadays, will actually register wheels also. Just not the 70's 14 inchers.
This is the 1980 ltd rear, looks the same as the one you picked also. Just has cooling fins and heavier.
I think THe LTD drum IS the one that matches the backplate, however the axle offset on the 8.8 is 1/4 wider, SO the at drum with interfere with the backplate on mine, I think. I am beginning to think that the 2 inch brake shoes I have bought , because they do not have the three contact points to the back-plates are wrong, and in fact a 2'' shoe should work in them IF they had them..... http://www.carid.com/images/monroe/brake-parts/bx581r.jpg even so, iot must be a later evolution of Bendixness - if that's a word? so even IF I go for the 2.5 - I should get explorer shoes?
Small bearing brake offset is usually 2.5" Brake offset-this is the measurement from the outside of the axle flange to the edge of the bearing retainer plate that bolts to the housing. Large bearing 9" housings have a 2 3/8" brake offset, and small bearing 9" housings have a 2 1/2" brake offset. There are also others such as 2" and 2 1/4", but you better have the drums and backing plates that go with those offsets or you could be in trouble as far as finding brakes to fit. Whichever backing plate, shoes and drum you use, they have to be for the same offset or things will not fit. (rub) I've never used backing plates from an 8.8 rear so I don't know what you need to do. 1990 towncar rear shoes are MONROE BX481R, different than you posted. I also came across this old post, maybe you've already seen it. It has a lot of info also. http://www.jalopyjournal.com/forum/threads/9-inch-small-bearing-rear-end-need-brakes.362935/
thanks Johnboy for the 2.5 tip, measured mine and they are 2.5!! back plate is 1.5 inches flange is 2.5 inches =4 inches drum is 3 3/4 should fit #well I bought them Bendix PDR0569 Rear Brake Drum One Pair Applications 1987-1991 Ford LTD Country Squire Station Wagon With 10" x 2 1/2" rear brakes 1979-1986 Ford LTD With 10" x 2 1/2" rear brakes 1987-1991 Ford LTD Crown Victoria With 10" x 2 1/2" rear brakes 1980-1981 Lincoln Continental With 10" x 2 1/2" rear brakes 1980-1981 Lincoln Mark VI With 10" x 2 1/2" rear brakes 1982-1990 Lincoln Town Car With 10" x 2 1/2" rear brakes 1980-1991 Mercury Colony Park Swation Wagon With 10" x 2 1/2" rear brakes 1979-1982 Mercury Marquis With 10" x 2 1/2" rear brakes 1983-1991 Mercury Grand Marquis With 10" x 2 1/2" rear brakes
they are the correct ones Johnboy34 - thank you very much for your help!! fit nice I take it I need to get longer pins, whilst on I am desperate for I think 4 of the t bolts, I think they are 3/8 oddly I imported 4 axles and brake back plates and of the 16 that should have arrived - 12 fell out of the box!!
Nice to hear it worked out. The bolts and pins should be easy to get, the shipping will probably be the most. They should be 3/8 - 24 and lock nuts. Just get brake hardware kit for the same cars with 10 x 2 1/2 brakes. http://www.ebay.com/itm/Currie-9504...ash=item5d33cde32e:g:sz0AAOxybi9ReNE1&vxp=mtr http://www.rockauto.com/en/moreinfo.php?pk=2593978&cc=1131118&jsn=509
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