I just got a disc brake back rear. Not sure what Year its outa. I need to try to figure that out. Any how, if the rear was installed in the car would one caliper be on the front side of the rear and one on the back????? I'm thinking that someone had a backing plate off or something and didn't put it back on right. I'm not sure though. Never had a disc brake rear before.

I'll end up having to get a caliper and E-brake cables. And a Proportioning valve.

Your guys thoughts on this??!

Thanks

Could be, yes.

JamesC

Ok, Seemed weird to me. I'm used to Hondas, Calipers all face the front on the front and to the rear on the back.

AFAIK, the thirdgen rear calipers bolt on funny, and one will face forward and one will face back. I think it's because you have to rotate them to get the pads in, so they both rotate in the same direction and give you roughly the same clearance. I think both rear calipers are the exact same too.

Edit: Just did some research, and it seems the PBR rears have both calipers on the same "side" (different part numbers for left and right calipers), while the cast iron delco moraine calipers oppose each other (same part number for both left and right). Before you install it you might want to consider upgrading the rear brakes. I currently have the rear delco's, and can safely say that I never have to worry about them locking up. Or engaging, for that matter!

Edit 2: Oh, and since it has cast iron rears, it's an 89 or earlier disc rear. Which means it also is *officially* a 7.5 and not a 7.625", and has a low spline count for the axles (26, I think.). I got lucky and managed to snag a disc rear from a 92. Good brakes and good axles (28, I think).

Whats the PBR about. Do they mount up the same?? Do they bolt on using the same backing plate?? I haven't got to look into any of this yet. Still new to me.

PBR disc brakes are aluminum calipers. They use different backing plates and I believe different rotors. They are rumored to have come with the 1LE package, and did come on 89 and later rearends and so might be found on a few 9-bolts as well.

Here're some PBR pics: https://www.thirdgen.org/forums/faq-...iscs-89-a.html

JamesC

Thanks for the link, I definatly don't have the PBR rear. The caliper that is there isn't aluminum. However I poped the cover and found a limited slip Diff. 3.23 gears though.

The 82-88 disc brakes are the cast iron ones, made by the GM plant in Saginaw, and they mount one in front of the wheel and one behind; the 89-92 are aluminum, made by an Australian company named PBR, and mount in the way most do, with both on the same side of the wheel (behind, in this case). The PBRs are VASTLY superior. The Saginaw ones are notorious for not working at all, and for being difficult to keep working even if one finally does get them to work. Additionally, their hydraulic requirements are substantially different from drums, which requires the master cyl and prop valve to be changed in order to have any chance of them working; the PBRs however use the same MC & PV in at least some years, 91 & 92 at least I believe, and so are much more nearly a direct swap.

Are you saying that the PBRs use the same MC and PV as the Saginaw Brakes or Drum Brakes.

My Car Currently has Drum brakes.

Later models use the same Master Cylinder on both drums and PBR discs. However, the proportioning valve is different between all three.

Do you know if it's a Chevy/Ford rear end? If it is you should be able to get the #'s off the axle and find out what it came out of.

Its out of a camaro. I know that for sure.

See if you can find the axle #. You should be able to call a dealership and find out what year it is.

If you look on the passenger side(right)axle tube you may still be able to read the numbers that were stamped from the factory(may take some cleaning).They will give the axle code(ratio and posi/non-posi),build plant and build date.

My '83 has factory 4 wheel discs and the cast iron rear calipers are a pain to work on but they do work well.Main thing if to engage the parking brake when she's park.This is how the rear brakes adjust(there was a recall for manual cars in '83 for disc brakes cars parking brake not holding).