I have read the posts regarding putting in the larger s-10 manual brake wheel cyls for their bigger bore. Too cheap to go disk for the amount the car is driven. This can be confusing so I apologize up front. Ok, car is a 78" Monte. In the process of installing a 8.5 rear from a 86 olds 442. I ordered and received new brake lines. Lines arrived, look correct, and have a blue color on the fittings for the wheel cyls. Ok, did a bit of homework on the cyls. to be sure when I go to the s-10 (P/N w37644) the thread pattern will be correct. It looks like maybe some years got the 3/8-24 threaded cyls, and maybe some years got the M10 x 1.25. I maybe wrong here, but I thought the colored fittings generally means Metric? I went on rock auto and looked up the cyls. for a 86' olds 442, and depending on which brand I look up, some say thread is 3/8-24, some say M10 x 1.25? can anyone definitively tell me the correct line and cyl. thread pattern please!
Wheel cylinder
- Thread starter Jim Larkin
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brake lines were never metric on a G body. The colored fittings are metric. You might want to order this upgrade as well
Raybestos GMB25851 Rear Wheel Cylinder Bracket
Raybestos GMB25851 Rear Wheel Cylinder Bracket
Aren't there special retainers that go with the wheel cylinders? I'm going to have mine apart soon, and am interested in doing this conversion on my 7.5. Is there a "how to" thread on here?
Nevermind, Pontiacgp posted right before I asked the question or as I was typing...
They're on the way.
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I've done a couple of these. Just be careful. There is little room for error when drilling through the backing plates and axle mounting pad. The axle flange has cut corners where the bolt holes are to be drilled. Just doublecheck everything before drilling..timo22
I never used that bracket but when I installed the 8.2 rear that has bolt in wheel cylinders. The 8.2 uses the same drum and same size shoes but worked much better than the brakes on the 7.5 rear so the improvement must have been from the wheel cylinder not moving around. I think that bracket would be a noticeable improvement on the rear brakes on the 7.5 and 8.5 rear ends
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