I know some people are using 4th gen rear brakes on their cars.

I have a moser 12 bolt and they come with big ford bearings. My 9 bolt brakes do not mount to this flange. I saw in "chevy high preformance" that they installed this exact rear on 4th gen reusing its brakes. Who sells rear 4th gen brakes. stock ones, or do i have to go to the jusnkyard. I am pretty sure I am just gonna have the backing plates machined to get my old brakes to fit. But this is an annoying thing to have to do.

Any insight on the situation??????? please

The 12-bolt aftermarket rears made for our cars have a 10-bolt backing plate pattern so you can use any brakes that came mounted to a 10-bolt. You can use the stock thirdgen rear disc brakes like the 88-92 rear PBR brakes.

Hmmm well I had a 9 bolt. At least I am 90% sure of it. Isn't that the stock rear. It was a 305 with a T-5 and dual cats and TPI. All I know is that there is no way the backing plates I have will mount up to the big ford ends. I have had the bearings pressed on with the backing plates in place and tried to install them. I had to take the axles back out of the housing and have the bearing unpressed. I am buying new bearings now and seals. Now I have to have the backing plates machined. I started another thread about this a while back. And other guys said that they had to do the same thing.

I do have disk brakes, but I am not 100% sure if they are PBR. what does that mean or are there even different kinds. I know a good deal about camaro's and have never herd of different kinds of stock breaks appart from 1LE stuff.

Just wondering about the 10 bolt rear. If they came on camaros then how come I didn't have one, and what should I look for? Cars that had 350's or somehting (at a junkyard)??

Thanks for any help.

Sorry I missed that in your first post. 9-bolt brakes have a different backing plate pattern then the 10-bolt's do. You need to do a search this has been covered too many times. You can buy the 10-bolt backing plates for about $20 each at the dealer.

You also need to do a search on this. There are 2 rear disc brake setups that came on thirdgen's. Pre-89 disc and 89+ disc, all disc brakes cars made before 89 had the crappy iron rear calipers. All 89+ cars got the aluminum PBR calipers. There was not "1LE" rear disc option, all 1LE cars got the same rear disc's as the stock 89+ rear disc cars.

Check this link for pics of backing plates and PBR's:

https://www.thirdgen.org/techbb2/sho...hreadid=246768

JamesC

I will just have my old ones machined