Rear disc brakes for a GM 10 bolt 8.5, True-false or maybe ?

Discussion in 'The whoa and the sway.' started by BWINN519, Jan 27, 2014.

  1. BWINN519

    BWINN519 Big B

    This weekend while watching the new "Powernation musclecar show", It was said that the rear disc brake set up, off of a 98-02 camaro will easily install onto a 10 bolt, 8.5 rear end ? Is this correct, has any one done this and if so how did it work out ?
     
  2. bignastyGS

    bignastyGS Maggot pilot

    I thought someone did this to their Buick.Thought they needed to machine a bracket or something. I'd love to have 4 wheel discs on my car...
     
  3. BWINN519

    BWINN519 Big B

    there currently doing a pontiac build, last weekend was the rear part, and they stated that the disc brakes they were installing for there 10 bolt, 8.5 was from a 98-02 camaro and the only extra item needed was was four hole backing plate
     
  4. JR Wills

    JR Wills Well-Known Member

    I know Robert (86TexasT on the board) has done numerous of these "Conversions" on G Bodies. He may be able to offer information.
    JR
     
  5. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    I've heard of this, though hadn't really verified it. First time I heard it was probably about five years ago. I think with the '98-'02 cars finally hitting the bottom of the depreciation curve and general life cycle that more are ending up in the junkyards now and this swap is starting to become more feasible and popular.
     
  6. techg8

    techg8 The BS GS

    The BOP 8.5s (non c clip) will differ from the Chevy (c clip) 8.5s in the axleshaft bearing and seal setup, and the ends of the axletubes and the brake flange ends. So disc brakes from a c clip 8.5 10 bolt rear should interchange with c clip 10 bolt 8.5s, but not so easily with a non c clip 10 bolt 8.5

    I once looked into swapping rear disc brakes from a 93 or 94 Caprice or Roadmaster 8.5 10 bolt (c-clip style) onto a BOP (bolt-in axleshafts) style 10 bolt 8.5. It would have required a conversion flange of some sort.

    I have seen someone selling conversion flanges for just this purpose...I think it was on this forum.
     
  7. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    The '98-'02 F-bodies have 7.5" diff's if I am not mistaken. Which doesn't mean the brakes wouldn't bolt up to an 8.5", but figured I'd mention that. And I agree that a c-clip axle (Chevy) versus a non-clip axle (BOP) is a huge difference.
     
  8. BWINN519

    BWINN519 Big B

    Found the backing plate on E-bay for like $10, Think I'ma hit the local "U-wrench it", this weekend and get the whole rear disc brake setup and all..
     
  9. speedtigger

    speedtigger 9 Second Club

    I think I read of people using the rear brakes off of the s-10 trucks and blazers.
     
  10. BWINN519

    BWINN519 Big B

    May have to, do some research on the blazer ideal, thinking they may have had a 10 bolt
     
  11. knucklebusted

    knucklebusted Well-Known Member

    Most small Blazer/Jimmy trucks had the 7.5. It has to be a ZR2 I belive to have the 8.5. Even then, I think my S10 ZR2 had the small ends on the 10 bolt rear.
     
  12. bignastyGS

    bignastyGS Maggot pilot

    There is a problem also with clearances with the brackets when you use aftermarket axles like Mosers,Mark Williams and Strange too..I take it that it's just a machining issue though that isn't hard to take care of..
     
  13. Gulfgears

    Gulfgears Gulfgears

    It has been previously posted on the board, how a member changed his either 8.2 or 8.5 rear end over to disc brakes using the Olds Bravada or S-10 rear brakes. Few non OEM components were needed if I remember correctly.

    I have the article somewhere but don't remember where. Have to look for it.
     
  14. RACEBUICKS

    RACEBUICKS Midwest Buick Mafia

    79 Trans Am rear disc set ups people. And then also I have a bracket I have had made that allows a regal front caliper using a 79 TA rotor but you lose the e brake part.
     
  15. 72newbiebuick

    72newbiebuick Gold Level Contributor

    Mike,

    So get a setup from a '79 T/A? I have a 72 Skylark that has bolt in axles and wonder if that makes it harder to switch over. I assume you are saying to get the backing plates and all yes? Do you still use a front disc / back drum proportioning valve and what about the master cylinder? I have the "70/30" Master with the front resevoir being larger.

    Mark
    72 Skylark Custom
     
  16. bignastyGS

    bignastyGS Maggot pilot

    What about the E brake hookup as well??
     
  17. RACEBUICKS

    RACEBUICKS Midwest Buick Mafia

    If you get the TA set up the Ebrakes work you need to make cable changes. The TA set up can be used with the bolt in axles as well. No problems Done it. I have a complete one here now myself to use someday.

    The bolt on bracket I make does eliminate the ebrake as its using a buick regal front caliper and the rotor from a 79 TA No way to hook it up. (if your like me you never use them anyway lol)

    also one more thing the cost of the calipers and rotors and the rubber brake hose for the regal fronts hooks it up to the factory steel lines then bleed. The brackets are $25 plus shipping so the costs for rear disc are cheap. HOWEVER.... the pressure needs to be the same 4 square. If you have disc on the front the dist block needs to be changed. I have used the 4 wheel drum block with good luck
     
  18. Taulbee2277

    Taulbee2277 Silver Level contributor

    I have had Mikes rear brackets on my car for several years and love them. I used 85 regal front calipers and 79 trans am rotors like he mentioned. The only down side is I had to pay the core charge when I bought the calipers.

    uploadfromtaptalk1391386915937.jpg
     
  19. RACEBUICKS

    RACEBUICKS Midwest Buick Mafia

    There ya go
     
  20. 72newbiebuick

    72newbiebuick Gold Level Contributor

    Mike,

    the TA setup does or does not need an Ebrake cable change? And this setup hooks up to existing lines and uses the front disc rear drum valve?

    Mark






     

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