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Old 01-22-2013, 11:23 AM   #1
Jeep78's Avatar
Join Date: Jan 2010
Location: South Florida
Posts: 60
Brake Issues (CJ7)

This is what I have: Disc brakes (front/rear), brake lines run from master cylinder straight to the front brakes, also from the master to the rear brakes with a proportioning valve in line.

The master cylinder has been replaced. The brake lines have been bled numerous times. The pads are in good shape.

The brakes are not working properly. The stopping distance is not where it needs to be. The pedal is easy to push but the brakes take awhile to stop the jeep. It feels as if the brake lines still need to be bled but that's not the problem. I have a feeling its something to do with the whole setup. Maybe I need a proportioning valve, maybe I dont.

Quetions: What is the original setup for the cj7 (1982)? What should the setup be for my jeep with a v8, 305hp.

Appreciate any help in the right direction. It's frusturating right now cause my jeep has a new motor that needs to be run but it can't be run to much cause of the brake problem. Thank you

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Old 01-22-2013, 08:00 PM   #2
Goofyjumper's Avatar
Join Date: Jan 2013
Location: Highlands Ranch, CO
Posts: 192
Brakes are frustrating to deal with and they have to be done right. I went thru this process recently upgrading the brakes on my CJ-6 to disk brakes all around.

With a new master cylinder it is really important bench bleed it. Air bubbles can get trapped in the master cylinder really easily leaving the squishy feeling in your brakes.

Another issue you could be facing is that a stock master cycinder is not designed to push enough fluid to actuate rear disk brakes because it is designed for drums.

I ended up having to upgrade to an after market YJ brake booster and cylinder to stop my jeep. (3/4 ton disk brakes all around and 40 inch tires.)

2013 JKU Rubi, Minor Mods: Sheldon
1974 CJ-6, 1-tons, 40's, 401 V-8, TH400, and lots of stuff: Panthro
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Old 01-30-2013, 07:48 PM   #3
Jeep78's Avatar
Join Date: Jan 2010
Location: South Florida
Posts: 60
Another BRAKE question. Does anyone know if the original brake booster on the 82' CJ-7's have a dual diaphragm or a single?
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