12" disk brake conversion question

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by sniggle_t, Jun 2, 2005.

  1. sniggle_t

    sniggle_t Veteran Member Lifetime Gold Member

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    Jun 1, 2003
    Schenectady, NY
    I have a set of spindles sitting here w/12" rotors on them. Part #'s 369055 and 369056

    They are definately GM. Anybody know if I can use these for the 12" brake upgrade? They don't match the part #'s listed in the article but I'm hoping these will work.

    Thanks
     
  2. sniggle_t

    sniggle_t Veteran Member Lifetime Gold Member

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    Jun 1, 2003
    Schenectady, NY
    some more info,

    The ball joint holes look to be the same size as the original 72 camaro spindles.

    The spacing between the upper and lower ball joint looks the same.

    The arm where the tie rod hooks on is about 1/4" longer than the Camaro's arm.

    The spindle shaft measures about 4 1/2" long.

    The diameter for the seal is 2"
    The diameter for the inner bearing is 1.250"
    The diameter for the outer bearing is .842"

    Thanks for any help I can get.
     
  3. rscamaro73

    rscamaro73 Administrator Staff Member

    Used Cars & Used Auto Parts Sale: 1993 Spindle: Brougham 1990, 1991, and 1992 w/Abs
    Fits:
    Brougham 1990, 1991, and 1992 w/Abs
    Caprice 1991, 1992, and 1993
    Caprice 1994, 1995, and 1996 Sw, except public service vehicle
    Caprice 1994, 1995, and 1996 sedan, drum rear brakes, except taxi option 9c6
    Custom Cruiser 1991, and 1992
    Fleetwood 1990, 1991, 1992, and 1993 rear wheel drive, w/Abs
    Fleetwood 1994, 1995, and 1996 w/Abs
    Roadmaster 1991, 1992, 1993, 1994, 1995, and 1996

    Notes:
    identification 369055
    identification 369056


    GoBoom Sale Price: $113
     
  4. sniggle_t

    sniggle_t Veteran Member Lifetime Gold Member

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    Jun 1, 2003
    Schenectady, NY
    Thanks Wayne, now I know what they come from. But will they work?
     
  5. BluEyes

    BluEyes Veteran Member

    3,056
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    Jul 8, 2001
    Michigan
    you're in luck - I still have the spindles that I couldn't use because of the larger LBJ, and my old spindles laying around.

    The thin end of the taper for the LBJ hole (the side the castle nut goes against) measures:
    0.595" for a Camaro spindle
    0.64" for the spindles with the larger LBJ

    Seeing that the Caprices on that list exclude the public service vehicles, I think you're in luck. It was the cop cars, and trucks that got the larger LBJ (because of breakage issues though, hmmm...)
    I would carefully inspect the steering arm though - another member had a problem with the tie rod hitting the wheel after this swap. You say it is longer. I would carefully examine to see if it is any further outwards. You can also test-fit your rims on the spindles with the 1LE rotors before you go taking the suspension apart.

    ------------------
    -'77 Camaro 'Original' - 357, home-ported heads and intake, Q-jet, headers, hyper flattops, ~8.5:1, 3.42 gears, 214/224-112LSA cam, 1LE rotors, D61 pads, 5642 springs
    -'92 LeBaron LX sedan - all family owned, great daily driver and highway cruiser. 52mm TB, rear discs swapped.
    -'70 Camaro - 350, 4-sp, nothing power, needs work, lotsa fun
    -'65 Nova - 230 I6, 3 on the tree, nothing power. HEI swap.
    -'70 Cadillac Sedan Deville. 10:1 472ci, TH400 - stock.
     
  6. sniggle_t

    sniggle_t Veteran Member Lifetime Gold Member

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    Jun 1, 2003
    Schenectady, NY
    OK, I looked into the steering arm more closely.

    It is actuall the same length as the camaro one. The hole for the tie rod is almost exactly the same distance from both the upper and lower ball joint holes. BUT, the spindle in questions arm is 3/8" closer to the rotor than the camaro one. (further outwards) I don't have my 1LE rotors yet so I can't give it a try.

    [This message has been edited by sniggle_t (edited June 02, 2005).]
     
  7. John Wright

    John Wright Veteran Member Lifetime Gold Member

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    Aug 9, 2002
    Rustburg, Va
    How about the diameter of the hole for the LBJ?

    ------------------
    John Wright
    ------------------------
    Ok, now go change all your passwords :)
     
  8. sniggle_t

    sniggle_t Veteran Member Lifetime Gold Member

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    Jun 1, 2003
    Schenectady, NY
    lbj is the same size as my camaro. So is the upper and the tie rod.
     
  9. SHANE 73Z

    SHANE 73Z Veteran Member Lifetime Gold Member

    3,055
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    Feb 26, 2002
    Meadow Lands, PA
    Scott,

    Sounds like those spindles should work for you. I found the same thing as far as where the tie rod mounts. You will have massive toe-in until you get an alignment done. There is enough length on the tie rods to compensate for this.

    Take care,
    Shane
     
  10. sniggle_t

    sniggle_t Veteran Member Lifetime Gold Member

    1,893
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    Jun 1, 2003
    Schenectady, NY
    Thanks Shane. You say you ran into the same thing on yours? Adjusting the tie rods that far doesn't make for a weak connection at the adjuster? (looks to be about 3 turns)

    I have run across info on global wests website suggesting that these will work ok.

    http://www.globalwest.net/1964-72%20disc_brake_conversion_informatio.htm

    Any other thoughts or opinions from the board members? I don't want to start cleaning these up unless i'm positive they will work.

    Thanks.
     

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