russell7088

HELP need these olds gurus to jump in and take a look at this for me and help me understand i may be getting excited but this looks like it may be a solution to us 69-70 b-body solutions for front brakes.

http://www.antechlabs.com/K0GFM/MJC1...Conversion.pdf


i REALLY hope this is true and will work i just get lost reading it ( with kids tryin to talk to me and wife asking questions) but one of you will be able to confirm or bust my bubble HAHA hope not . i will be online all day waiting
again my 70 88 has disc brakes on the front already so let's see what will happen with this

Summerof84

Well, my first thought is that Corvette will be 120mm bolt circle while you are 127mm. Rotors can be redrilled though.
The Scarebird conversion for early 60's Olds drums to disc uses a '75 Tbird 127mm rear rotor and off the shelf basic bearings from NAPA to replace the early tapered bearings onto the factory spindles (with their special hub). I would order a 75 T bird rotor and see if the Olds bearings fit into it.
Manufacturers rarely did special sizes, they just picked a size from the Nice or Timken catalog. So, you may need the bearings Scarebird specs too.

russell7088

scarebird is worthless for these cars i have called them and none of their kits will work on a DISC brake car. i dont have drum spindles to work with and they even said that they have nothing for it anyway just ealy 60's as you stated. also at this point when i cant drive car because of bad rotors i will buy new wheels for it if i have to i have also located a 12 bolt out of an impala that should bolt right in, better for gear changes and also rear drums since they are no longer available. this would also allow me to upgrade to disc brakes on the rear.
thanks for the input

Summerof84

I never recommended scarebird, I simply stated that the 75 T bird rear is 5x5 and that is what they use. If you know that drum and disc spindles are a different diameter, and no off the shelf bearing will fit the difference, then the impala conversion is your easiest solution. .040 in size difference is for you to decide to use.

russell7088

no problem i have had multiple thread on this and scarebird keeps coming up and those who know the 69-70 issue have been helping on this.. also that conversion link is stating that the 69-82 corvette disc will work with this spindle
so i dont have the knowledge to read the article and know what the diameters of the bearing and all that is. if you know all of these your help is greatly appreciated.
thank brian

InfoJunkie

The inner and outer bearing are the same for a 70' Delta and a 70' Belair.
Logically that should work. Only way to find out is to try it

joe_padavano

No, since logic says that the 5 x 4.75" bolt circle on the Chevy is not the same as the 5 x 5" bolt circle on the Olds.

InfoJunkie

You are correct about the bolt patterns. I was just following from this part. Should have put the quote in earlier. Sorry

joe_padavano

I've posted this before. Unfortunately, I don't own a 67-70 full size with disks, or I'd try this myself. The 63-70 cars (except the J88) use the same inner and outer front wheel bearings as the 71-76 cars. The rotors for the 71-76 cars are still available and have the correct 5 x 5" bolt circle. I do not know if the diameter, thickness, or rotor offset from the wheel mounting surface is the same as on the earlier rotors, however. Centric P/N 120.66000 is available from RockAuto for under $50 each.

russell7088

the bolt pattern issue is correct but im at the point that i will change bolt patterns so i can drive my car without problems.
the 71-76 wont work because of the off set on the rotor, which is why the article that i posted caught my attention the owner has a b body chevy impala which has the same issues as the delta 88 and 98 so my thoughts are that this will help us also, i might just go buy the parts and check everything out i thought someone may have more info on the dimensions of the 69-70 rotor to compare this with.
Joe thank you again for posting and all your info you have help me alot since ive been on the forum, we r not to far from each other gonna have to make a day trip out of it and come say hi!!!

joe_padavano

How far off is the offset? The rotor I posted above has a height of 4.88". There's another rotor that uses the same bearings and bolt circle, from a 1988 C1500 pickup with F44 HD brake option that only has a 4.51" height:

russell7088

joe would that be a measurement from the back surface of the rotor to the front mounting surface where the wheel would bolt up i have a rotor off a 70 88 that i can measure. i will look at these rotors tomorrow when i go back to napa and compare better
again thanks joe maybe i should bring you the car and pay ya to look into it for me, just dont know enough myself to just start pulling apart !!!!

D Appeldorn

Do not understand it but this is what i found in my shopmanual.

Wheel cylinderbore 2-15/16"
Linings length 5-3/8"
thickness 7/16"

Disc diam. .965"
lateral runout .004"
parallelisme .0005"

Disk thickness max 1.250"
min 1.215"

I also have a front disc setup on my 69" 88, and need in the futere also a solution on this.

If nothing works i was looking for this http://www.summitracing.com/parts/SSB-A129-13/?rtype=10

from summit, i do not know if someone having experience with it.
It is expensive, and i do not need all the parts, but í am also unable to find drum spindels becouse i live in the Netherlands.

So if it works and it is easy to mount or adapt let me know.

russell7088

well the drum spindles are not that easy to find here either not just the netherlands so dont feel bad about that. i did take a front hub assembly to a very knowledgable vette guy i know and we compared the two hubs and it appears that it may work, i gotta find some vette hubs to try this gotta locate some used ones instead of buying new ones right now. the rotors are dam near the same, bearings are the same also. The only thing not sure of yet is where will the rotor sit once mounted compared to the caliper, then if the caliper is off i will then try to get the vette caliper to bolt on, gotta compare the two side by side

joe_padavano

Well, if you CAN find a set, there's one more rotor you can try. The Chevy Astro Van with AWD used a separate rotor with the 5 x 5" bolt circle. It is the correct diameter and thickness as the D88 rotors. Again the only question is offset of the rotor relative to the spindle, but with a separate rotor and hub you have some flexibility to mount it front or back. You may need to have a couple of centering rings machined if the pilot hole isn't the right diameter to match the hub. Try this one:

russell7088

im gonna try to measure the 88 rotor tomorrow try to see what we got

D Appeldorn

let us know,

i took of my spindels and clean/ respraid them but was a big pain ...... to take those off.

and where is the differense between the disc and drumbrake spindel?
On picture they look almost the same. compared to the other thread with the scarebird set.

And does anyone know what bearing original used on the discbrake? could'nt vind the numbers.
Need the numbers of the front and back and bearing and "centercup"

D Appeldorn

and does anyone have more data about the original disc/ rotor?

So if anyone having the factory specs, it would be usefull

I also think that the same "69" number/ rotor should be made fore other cars.

joe_padavano

The rotors were used on other full size cars for 1969-70, but they are not currently available from any source. As with the A-body cars, the drum and disc spindles are the same except for the machined height of the boss that the upper caliper bracket bolts to. This link shows the differences on the A/F/X body spindles. The B/C body spindles are similar but not exactly the same.

http://www.pozziracing.com/brakes.ht..._brake_spindle

DennisG.

I don't believe the other 69-70 full size car rotors are the same. When I was selling the disc brake setup off my 69 Delta 88 that I parted out, I was looking for info on the rotors because mine were bad. I found out that someone is reproducing the rotors for 69-70 full size Pontiacs but all the info I found says each division used there own spindles and rotors. Now, please don't hold me to this, I don't know how true any of this is. I'm only offering this as helpful information. I know the Pontiac rotors were on ebay. Good luck.

D Appeldorn

Could be, but they shared engine's so why not disk/rotor's and spindels?

My first gues is a buick or pontiac of the same age.
As refer to my question on fabrik number of the brackdisc.

Is it not mentioned in the parts list of the dealers? i gues they could order a new set of disc's.

If we have propper demensions and numbers of the original it is easier to vind a solution.


second, Russel are the rear drumbrake shoes also not available ?

joe_padavano

Pontiac uses different wheel bearings in those years, so yes, the Pontiac spindles are different. Olds, Buick, and Chevy use the same wheel bearings. Chevy uses the smaller 5x4.75" bolt pattern, so those rotors don't fit. Buick and Olds use the same bearings and same bolt pattern, so I'm betting the rotors are interchangeable. Hollander doesn't show an interchange, but as I've noted previously, they also don't show an interchange between Cutlass and other A-body disk spindles for the 70-72 cars, and we all know that's not correct.

joe_padavano

Uh, no, they didn't.

D Appeldorn

question nr 2,

is there a difference between the 1968 1969 and 1970 brakepad?

http://www.autopartswarehouse.com/de...uSHFIcA=&gan=1

and frontdisc setup?

joe_padavano

1967-68 cars used the four piston calipers. 1969-70 cars used the single piston calipers. The pads for each are different.

These are 1967-68 pads:



These are 1969-70 pads (actually, they fit 1969-76):



The link you posted is for the -00520 pads, which are correct for your car.

D Appeldorn

Any news?


just curious on the progress.

D Appeldorn

Now i am curieus, how hard can it be and are people willing to trie helping with this.

As first, drumbrakespindels are differend than disk brake,

What kan be done to this to mount those kits on oure stock discbrake spindel.

where is the huge difference it can't be done? There are so many stories and data.

So i post my diskspindel just painted and one foto i found on the net.
( jep advertised with scarebird)



Uploaded with ImageShack.us



Uploaded with ImageShack.us

The reason i forward this thread, i live in the netherlands.
And can't return parts i order when it doesn't fit.

And with a few years i need new disk's to

D Appeldorn

and a link to a just conferted drum brake olds.

http://forums.aaca.org/f138/disc-bra...-a-285094.html

Yellowstatue

Hub & disc assembly, front wheel- PN-399458 for '69 & '70...

delta70

Hi all,
I am wondering if anyone has found a solution to the disc brake rotor replacement for the 70 88. hasn't been a post since end of feb. 2011.

Edveen

This weekend I am going to measure one of the rotors from the 69' 88 with my caliper. I will take as many measurement as I can. I am very curious to know the thickness now.
Ed

6/5
need to get socket to remove the nut. Mine was small, looks like its 1-1/4" to get out, I had 1". will take care of it next weekend.

mpolds

I have indicated on various responses to people all over Classic Oldsmobile
that I HAVE some (not many) N.O.S. Front Rotors for the 1969 - 1970 OLDS FULL SIZE application ------ it is all by itself on Planet Earth ------ and VERY OBSOLETE ----- no Centric Rotor will do with any modification..............

Best to call me -- Craig -- 516 - 485 - 1935....New York.

russell7088

ive called ya waiting to hear back