1969 Road Runner Disk Brakes

[1969runner]

I ahve been told that 1970 Monaco disk brake assy with the spindles will fit on a 69 road runner. Is this true? I know that the RR disk brakes were DBBL piston and the Monaco is a single. Just looking for improved stopping power.

Nick

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[ChristianCuda]

Yes it will fit the older brakes were 4 piston but the single piston are very strong and more are available for these.

Christian

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68 'Cuda 383 Formula S recreation
Working on adding EFI
69 'Cuda Race Parts Car
76 Duster 273 recent transplant
95 Neon 2.0 SOHC best of 16.96
84 Dodge Ram D50 transplanting 360

[gillyiowa]

What other year disk brake set-ups fit a 1969 Roadrunner? Does a 73 cordoba?

[txs]

70 monacco is a c body, the spindles won't fit. I don't think the cordoba came out until 74 or 75. The 70s cordobas are b bodies, but all the b bodies got the rubber isolated k frames for the 73 MY. Therefore the spindles are taller than the correct spindles, this puts the upper balljoint at more of an angle at the end of the suspension travel. Some say you can get away with this, I wouldn't trust it. They (73 and up b spindles, also the fjm body) will bolt on but you want to chance breaking an upper ball joint? Correct spindles are the 73 76 A body disc brake spindles, they bolt on and have correct geometry. Better hurry, they are drying up fast in my part of the country. Probably in your neck of the woods too.

[451boy]

Best brakes for an A, B or E body Mopar is to use the '73 to '76 A body spindles and calipers. Then use the 11.75 rotors and caliper adapters from a late 70's B or R body. This combination of parts will give you the very best brakes Chrysler made up to the Viper. Add an aluminum master cylinder from a late 70's RWD car or light truck and you're set. Check out this month's edition of Mopar Action for the next logical step after the A body/R body setup.

[1969runner]

What about the disk brake setup off a 1980 Diplomat??? I was that this was a great setup to use if you can find it.

[451boy]

Nope. The spindles from a FMJ body are too tall to work on a B body. Besides, the FMJ body stuff is the small 10.87 rotor. Use the big 11.75 rotor for better brakes.

[1969runner]

I have this guy (Winkle Auto, 603-673-4616) who has a Mopar parts yard who insists that the “A” body disk brakes off a 1980 Diplomat works great and that he sells them all the time. I don’t plan on drag racing all the time so in my application, the 11 ¾ inch would be over kill however, I’m concerned about the height difference between the “A” body and “B” body (1980 Diplomat setup to my 1969 Road Runner).. At this point I’m totally confused and do not know which way to turn.

[1969runner]

Also, were would I get the "11.75 rotors and caliper adapters from a late 70's B or R body" from that you stated below?

[txs]

75,76,77,78 cordoba or dodge magnum. Be aware that the cordobas came with either type caliper, slider or pins. not sure about the 79 cordoba, if it looks like a mirada then it's not a b body. the 79 and 80 new yorker and st. regis are b bodies. some of the 70s furies were b bodies but I don't remember when they changed. the c body caliper adapters have a wider bolt hole spacing where they bolt to the spindle so you can't use them.

[ZIPPY]

Originally posted by 1969runner:
I have this guy (Winkle Auto, 603-673-4616) who has a Mopar parts yard who insists that the “A” body disk brakes off a 1980 Diplomat works great and that he sells them all the time. I don’t plan on drag racing all the time so in my application, the 11 ¾ inch would be over kill however, I’m concerned about the height difference between the “A” body and “B” body (1980 Diplomat setup to my 1969 Road Runner).. At this point I’m totally confused and do not know which way to turn.

Help!!

Well if that's what he says, he has no business running a Mopar parts junkyard. A Diplomat isn't even an A body, it's an M body.

Listen to what 451boy and txs are telling you, that really is the best, most cost effective way t

[1969runner]

What model would be a "A" body? Dart, swinger or what? I'm new to Mopar, I was a Chevy man and got smart!!! And they talk about 11.75 rotor (I knwo what that is) and an adapter from a "B" or "R" body? Never heard of a "R" body. Thanks guys for all your help to a new Mopar man.

Nick

Below from 451BOY__________________
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Best brakes for an A, B or E body Mopar is to use the '73 to '76 A body spindles and calipers. Then use the 11.75 rotors and caliper adapters from a late 70's B or R body. This combination of parts will give you the very best brakes Chrysler made up to the Viper. Add an aluminum master cylinder from a late 70's RWD car or light truck and you're set. Check out this month's edition of Mopar Action for the next logical step after the A body/R body setup.

[451boy]

A body is Duster, Dart, Valiant, Swinger, etc. Boxy little cars. Look for a VIN that starts with V or L. R body is basically the same as the B body in the late 70's. I don't know what the difference is between them, maybe the R body has a longer wheelbase? Look for a VIN that starts with X,S,T or R. Must be a RWD car with torsion bars going the long way. Do not use spindles off of a car with torsion bars going across the front of the car. They look the same, and they'll bolt in, but they are too tall. Tell your buddy at Winkle Auto that he is screwing people over by selling them something that is potentially dangerous. If you're still confused you need to find the Mopar Action brake article or the book by Tom Condran. They'll tell you exactly what I've told you but they go into more detail so it should be clearer.

[1969runner]

Thanks much 451BOY!!! I wish I could get my hands on that Mopar Action brake article or the book by Tom Condran. What is the name of the book by Condran? Does he go into the swap from "A" body to "B" body brakes as well.

Again, Thanks much!!

Originally posted by 451boy:
A body is Duster, Dart, Valiant, Swinger, etc. Boxy little cars. Look for a VIN that starts with V or L. R body is basically the same as the B body in the late 70's. I don't know what the difference is between them, maybe the R body has a longer wheelbase? Look for a VIN that starts with X,S,T or R. Must be a RWD car with torsion bars going the long way. Do not use spindles off of a car with torsion bars going across the front of the car. They look the same, and they'll bolt in, but they are too tall. Tell your buddy at Winkle Auto that he is screwing people over by selling them something that is potentially dangerous. If you're still confused you need to find the Mopar Action brake article or the book by Tom Condran. They'll tell you exactly what I've told you but they go into more detail so it should be clearer.

[sctur601]

try this out http://members.nbci.com/rghmopars/brake.htm

[1969runner]

This is a GREAT Article!!!! I'm ogin to put this on my web page. It's very detailed and easy to understand. You can check out my web page at http://www.hotrodder.com/nick

Thanks much!!!!!!!!!!!!

Originally posted by sctur601:
try this out http://members.nbci.com/rghmopars/brake.htm

[sctur601]

no problem. I am using this article to help me find the parts to put the 11.75 brakes on my 66 satellite. Im going to check out your website now. Sctur601

[1969runner]

DO you know were I can get the photo that is missing (forth one down from the top)? The link is http://members.nbci.com/_XMCM/rghmopars/bp41.gif I would like to find this for the ID of the caliper adapter and use it for my web as well.

Nick

Originally posted by sctur601:
no problem. I am using this article to help me find the parts to put the 11.75 brakes on my 66 satellite. Im going to check out your website now. Sctur601

[sctur601]

Ive looked and looked for that picture but cant find it or how to get it. Sorry Sctur601

[1969runner]

By the way, the caliper that is listed is for a 4 piston which is VERY costly.

[Mopar-muscle]

i know this guy at winkels , 1969 you may be a bit confused , he is probably telling you he sells the brake parts , except the spindles , if he is saying the spindles then he is wrong , i will ask him next time i am up at his yard ,

i wouldn't be surprised if he did swap in the spindles though , he did try to tell me that spindles from a 74 b body would fit my 69 and could be swapped from side to side to put calipers in the rear , that i know is wrong .

oh in case you haven't noticed it yet 1969runner , going to this swap meanss you need to modify your existing swaybar as the calipers will hit when turning all the way , the fix isto step up to the wildwood caliper sway with the a body spindles , but that will be costly . the alternative is to change to the 70 runner swaybar , you may need to change your k frame to do that swap , depending on the build date of your car , later 69's had a k frame withthe clearence and holes for the 70 swaybar .or go to an aftermarket addco bar , it comes with tabs to move swaybar inward and mount it in the 69 location ... good luck .

oh one other thing , once you get the spindles and adaptors you can buy everything else new from the parts store , these parts are fairly inexpensive .

[1969runner]

Thanks!! I purchased the parts from my local part store, the new rotor, caliper, bearings, seals, pads, and the rest came to $340. Not too bad when you think that I'll be running 11.75 rotors, great brakes!!

The other way to not modify the existing swaybar so the calipers will not hit when turning all the way is to mount the caliper brackets on the other sides. Left on the right and the right on the left. This would take care of it.

Nick

Originally posted by Mopar-muscle:
i know this guy at winkels , 1969 you may be a bit confused , he is probably telling you he sells the brake parts , except the spindles , if he is saying the spindles then he is wrong , i will ask him next time i am up at his yard ,

i wouldn't be surprised if he did swap in the spindles though , he did try to tell me that spindles from a 74 b body would fit my 69 and could be swapped from side to side to put calipers in the rear , that i know is wrong .

oh in case you haven't noticed it yet 1969runner , going to this swap meanss you need to modify your existing swaybar as the calipers will hit when turning all the way , the fix isto step up to the wildwood caliper sway with the a body spindles , but that will be costly . the alternative is to change to the 70 runner swaybar , you may need to change your k frame to do that swap , depending on the build date of your car , later 69's had a k frame withthe clearence and holes for the 70 swaybar .or go to an aftermarket addco bar , it comes with tabs to move swaybar inward and mount it in the 69 location ... good luck .

oh one other thing , once you get the spindles and adaptors you can buy everything else new from the parts store , these parts are fairly inexpensive .

[This message has been edited by 1969runner (edited September 26, 2000).]

[1969runner]

By the way, the guy at Winkels was very nice and is willing to help me and try to give me what I need. Not sure at what cost at this point yet. I'm not going pay $100 each for spindles. I can get brand new Mopar replacments from YearOne for $125.

Nick

Originally posted by Mopar-muscle:
i know this guy at winkels , 1969 you may be a bit confused , he is probably telling you he sells the brake parts , except the spindles , if he is saying the spindles then he is wrong , i will ask him next time i am up at his yard ,

i wouldn't be surprised if he did swap in the spindles though , he did try to tell me that spindles from a 74 b body would fit my 69 and could be swapped from side to side to put calipers in the rear , that i know is wrong .

oh in case you haven't noticed it yet 1969runner , going to this swap meanss you need to modify your existing swaybar as the calipers will hit when turning all the way , the fix isto step up to the wildwood caliper sway with the a body spindles , but that will be costly . the alternative is to change to the 70 runner swaybar , you may need to change your k frame to do that swap , depending on the build date of your car , later 69's had a k frame withthe clearence and holes for the 70 swaybar .or go to an aftermarket addco bar , it comes with tabs to move swaybar inward and mount it in the 69 location ... good luck .

oh one other thing , once you get the spindles and adaptors you can buy everything else new from the parts store , these parts are fairly inexpensive .

[1969runner]

If ANYONE can help me get these parts below, I'll be glad to give them a markup. Any one I have called try to rip me off for $100 or more. One guy tried to sell me the spindles for $125 each!!!!!!!!!!!! Dam, all us gearheads want to do is try to have fun and save a few bucks. I hate when people try to screw others to make a buck.
As far as Mopar Action, I'm going to call the publisher and get on the mailing list.

Thanks everyone for your help, I just need to locat these parts now

1) Front disk brake spindles from a 73-74 "A" body
Mopar numbers if you need them are=3402629 and 3402628

2) Caliper adapters from a 76-78 "B" body with pin type calipers
mopar numbers if you need them are 3880557

3) caliper pins mopar 4094147 (from "B" body caliper above)

[omnipotent1]

Just acouple of points! If you use the 11.xx inch rotors, you have to use 15 inch wheels! so if you have a set of 14 inch rally/road wheels you have to use the 10.xx inch rotors and subsequent caliper adapters.

Another thing. yes you can use diplomat parts. in fact, it's amazing how many ways there are to go about puting disks together from other chryslers (including C bodies if you change your ball joints).

Lastly, as to if the "tall spindles" are dangerous. I don't think so! in fact, if you are into cornering, the car responds much better. The tires might wear slightly faster, but I've never noticed it. Plus, you can still use your stock sway bar!

Just remember, there are any number of ways to do it. Don't let anybody tell you there is a right or wrong way! I was able to put 12.75 inch truck disks on my 69 C body! As the adds say... Just do it!

[451boy]

69runner, before you pay attention to these guys telling you the FMJ stuff will work, ask yourself one question. If the height of the spindle doesn't matter, why did Chrysler spend all of the money to engineer new ones? Why didn't they just use the taller ones on the '73 to '76 A body? Beware of backyard engineers. Unless you know what you're doing you should stick with factory combinations which have factory designed dimensions.

[1969runner]

Well, I'm starting to get VERY agravated. Can't find much in the way of spindles or the caliper bracket. When I do, the price is out of this world!! I have not found anything under $100 just for a spindle!! I would be better off getting a kit for $700 that fits on my current spindles...

If I knew this was going to be this crazy, I would have never started on this.

[451boy]

go to moparts.com and checkout the classifieds. There are several sets of A body spindles for sale over there. You'll also find that forum to have 10x the traffic that this one has. (and it runs on a faster server)

[omnipotent1]

Thank god that all the "idiots" such as Landy, Leal, Sheaperd, Petty, etc. Didn't have a "451boy" to throw water on their inovative ideas, and improvements! After all, NO ONE can improve on mother mopar's designs!

I find it rather curious though. after all, the screen name "451boy" would indicate that this individual has installed a 440 crank in a 400 block!!! And even gone so far as to have special pistons etc. built to do it! TELL ME IT ISN'T SO! After all, if this was an improvement, Chrysler would have done it themselvs!

Please mr. 451 boy, Go away untill you grow up to be a "451MAN". In the meantime, us "backyard mechanics", that don't have a clue, will continue to inovate and improve!

[451boy]

If you don't know what you're doing, you should stay away from messing with suspension geometry and brakes. That stuff can kill you and others. I've never met a person yet who knew what they were talking about when they told people to use the FMJ stuff. Someone wants to post the CAD file that shows the taller spindles improve bump steer, reduce camber rollover or something like that then I'm all ears. Otherwise, my advice is to ignore the backyard hack job and stick with stuff that real engineers sorted out using computer simulations, extensive testing and such. As for the Mopar experts, call them and see what they say. I bet they all tell you to not to take a chance unless you know what you're doing or can afford the mistake.