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Technical 9" ford wheel cylinder problems.

Discussion in 'The Hokey Ass Message Board' started by Mac_55, Jul 6, 2019.

  1. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Hi fellas , ive searched and searched , beat the shelves at 4 local parts houses and i give. Ive got to ask for help.

    Model A Ford coupe project , came with a ford 9" all mounted up with bare backing plates mounted. Plates had a ford number which i cannot locate anywhere , one fella had some listed as 68 gt350 on ebay but i think he is wrong because those wheel cylinders are too big aswell.

    Housing pattern is torino / big ford new style . axle offset is 2.5 ...
    My problem is every single 9" ford wheel cylinder i have tried , the boss with the bleeder screw and line port is too big to fit through the backing plate.

    When i throw the calipers on every 9inch wheel cylinder i can find , it measures 1.48 ..... The hole in my backing plate measures 1 1/4" to maybe 1 5/16" or 1.3125 .

    Ive checked ford mustang , truck , torino , cougar , 60's through 70's and when i got to the 80 ltd then it got way goofy.

    Backing plate is a bendix , stamped ford number 3202351 . 10" brakes.
     
  2. irishsteve
    Joined: Jan 10, 2017
    Posts: 570

    irishsteve

    Something early say 57-60?
     
  3. Please don’t take this wrong, but are you sure that it’s a 9 inch and not an 8 inch? Maybe check cylinders for an 8” rear end?


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  4. low budget
    Joined: Nov 15, 2006
    Posts: 5,538

    low budget
    Member
    from Central Ky

    Wow! First post in two years, You must be desperate:D (July/9/17)
    Do miss seeing your post around
     
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  5. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Yes sir. It had me wondering . it has been cut down and i dont think backing plates are original because the numbers on the pig go to mid 70's truck.

    And yup Low Budget , it has been awhile. I do alot more reading than posting haja. Usually i can get this stuff sorted but this one has me chasing my tail.
     
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  6. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    The center is deffinately 9 inch.. From there on out its a heinz 57 haha.
     
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  7. squirrel
    Joined: Sep 23, 2004
    Posts: 44,312

    squirrel
    Member

    So the backing plates could be off of just about anything, eh? I've seen Bendix backing plates on several other makes....but if it also has the Ford logo stamped on it, then it's probably from a Ford.
     
  8. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Yup Squirrel , has the ford logo stamped opposite the bendix number.
     
  9. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,147

    Johnboy34
    Member
    from Seattle,Wa

    Have you looked at the early Fairlane wagon (10 x 2 1/2), early 80's Lincoln (10 x 2 1/2) Those Lincoln backing plates will fit the big Torino bearings, the 8" and small bearing 9" will not.

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  10. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Thanks Johnboy , ill check them out. If i cant find it im thinking of opening up the hole some and making it fit. Thw aggravation is growing haha.
     
  11. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Johnboy , i think you may be onto something . So i jut checked out an 82 Lincoln and came up with a wc101610 ... This is the first time that i have found one with a different stlyle " Register " .....Thats what im calling the area that contains the bleeder screw and line port ,.... Its the first one with a different looking register than ever other 9" i have tried , Compared to a standard wc37783



     
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  12. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,147

    Johnboy34
    Member
    from Seattle,Wa

    The bore size could be an issue depending on power non power, but you can change master cylinder bore to compensate.

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  13. F-ONE
    Joined: Mar 27, 2008
    Posts: 1,908

    F-ONE
    Member
    from Alabama

    I went through similar with Oreilly cylinders on my 65 beater truck.

    The new wheel cylinders would not fit the backing plate on the front. They were too large. Since my originals were not bad, I put a kit in them.

    The new cylinders also fit some Dogdes maybe others as well. It seems the castings are off on these new replacements.

    This off shore stuff covers many models and in my opinion what that really means is, it fits........Nothing!

    Each year quality parts are dropped and or substituted.

    NAPA seems better in this regard for now.
    Try them, vintage parts suppliers and or other brands.
     
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  14. southcross2631
    Joined: Jan 20, 2013
    Posts: 3,203

    southcross2631
    Member

    Look at the NPD website. That's where I got mine.
     
  15. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Well , Lincoln was a bust , the register on that WC id the same 1.48 as the others.
     
  16. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Hey found a wheel cylinder that fits.....................

    1970 Chevelle....... I know , what an idiot right ? The register fits the hole in the backing plate and bolts line up. 7/8 bore and its within .20 length.

    Im trying them.
     
  17. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,147

    Johnboy34
    Member
    from Seattle,Wa

    Who woulda thought! Had you also exhausted all the Fairlane, Maverick, Granada, Mustang cylinders?

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  18. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    I made it all the way to courriee trucks which were way goofy .

    What led me to chevelle was , i tried one off of a 55-57 chevy axle i had and it was same size as all of the fords. Well a couple months ago my brother did a power brake swap on his 58 chevy and he was having a tough time with the stock big bore rear cylinders so he swapped in a set of smaller bore chevelle WC's and the register was actually smaller . so i went and grabbed a pair off the shelf at the part store and with a little light work with the die grinder and a little smoothing off the body of the wc on top and bottom they set right in.



     
  19. Mr48chev
    Joined: Dec 28, 2007
    Posts: 26,089

    Mr48chev
    ALLIANCE MEMBER

    One of the hazards and frustrations of following behind someone else who pieced the thing together to get a certain bolt pattern and maybe width.
     
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  20. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,147

    Johnboy34
    Member
    from Seattle,Wa

    Innovation at it's best!

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  21. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Little material off the bottom to flatten it out for the step in the backing plate and a little off the top to clear the anchor pin plate. I for the life of me cannot find anything that would have used this big sealed bearing torino style end and backing plate with such a smal bodied WC.

    The big wc is the size of every ford wc i have measured or found and there is no way it was going to fit.
     

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  22. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,147

    Johnboy34
    Member
    from Seattle,Wa

    Too further add more info here, I just checked the backup plates I have here. The 75 Maverick ( 10x 1 3/4 ) shoes. The ones my car are 10 X 2 1/2 bendix ford #321992-L & R both have 1.48 register holes for wheel cylinders.

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  23. southcross2631
    Joined: Jan 20, 2013
    Posts: 3,203

    southcross2631
    Member

    My rear brakes were 10 x 2 1/2 .Came off a 428 Ranchero 1969. Also Boss 302 and 428 CJ Mustangs and Cougar's
     
  24. Mac_55
    Joined: Mar 10, 2008
    Posts: 686

    Mac_55
    Member

    Yes Sir. That is ALL i can find. These backing plates of mine are 1.30 hole. Nothing i tried fit until i went Chevelle haha.

     
  25. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,147

    Johnboy34
    Member
    from Seattle,Wa

    Those seem to be some strange backing plates.

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  26. In these situations I have found that is is easier to weld up/ modify the backing plate to fit a more common wheel cylinder.
     

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