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Old 06-02-2005, 12:12:00 PM   #1
sniggle_t
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12" disk brake conversion question

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
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Old 06-02-2005, 12:47:00 PM   #2
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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.
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Old 06-02-2005, 01:01:00 PM   #3
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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
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Old 06-02-2005, 01:11:00 PM   #4
sniggle_t
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Thanks Wayne, now I know what they come from. But will they work?
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Old 06-02-2005, 01:50:00 PM   #5
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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.

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Old 06-02-2005, 03:00:00 PM   #6
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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).]
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Old 06-02-2005, 03:18:00 PM   #7
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Quote:
<font face="Arial,Verdana" size="2">Originally posted by sniggle_t:
OK, I looked into the steering arm more closely.

</font>

How about the diameter of the hole for the LBJ?

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Old 06-02-2005, 03:56:00 PM   #8
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lbj is the same size as my camaro. So is the upper and the tie rod.
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Old 06-02-2005, 04:23:00 PM   #9
SHANE 73Z
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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
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Old 06-02-2005, 05:43:00 PM   #10
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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%20...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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Old 06-02-2005, 07:10:00 PM   #11
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Scott,

The only other possible diffence that could be is the outer bearing diameter. It sounds to me like you have the large A3 bearing size. But the cool part of that is even if it was the smaller size, all it would take is an A2 bearing to make it work.

An A2 & A3 bearing have the exact same race (part pressed into rotor), only the inside diameter of the bearing is different.

Shane
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Old 06-05-2005, 02:05:00 AM   #12
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Yeah, those are the B-body spindles taht I've gotten off of a Cadillac and Olds wagon. They require big alignment adjustments, but will work just fine... I did see someone re-drill some caddy rear rotors to use them on a Camaro rear disc setup (all parts are same from some late 70's caddies and the Trans Am rear discs of the era except 5 on 5" bolt circle. I guess the fronts would be a little harder since it is the hub and wheel studs, not just holes for studs pressed in axles to slip through.

1LE rotors are a little pricey, but you may be able to find some for $59.99 or so, check http://www.rockauto.com

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Old 06-05-2005, 12:02:00 PM   #13
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and the 1LE rotors require metric lugnuts.
Available all over the ground at most any junkyard...
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