I finally put rear Disc brakes on my rear D60 and it seems like I'm having the opposite problem from every one else. I've read all about the E350 master swaps and others but lets talk about this first.

I have 3/4T Chevy calipers front and rear now and I don't have any leaks. Stock CJ7 MC and booster. I bled the brakes quite a bit and they will stop the Jeep. I started with the furthest wheel and worked toward the closest.

Heres what I dont understand: The pedal goes almost to the floor and the front brakes don't seem to be grabbing but the rears will lock up. The prop block makes a kind of squeeling/whining sound when I mash the pedal. Like the fluid is being squeezed through an obstructed hole.

Why aren't the front brakes working very well now I haven't even messed with them or anything else from the prop forward except for bleeding?
Am I missing something obvious?

that proportioning valve is for a disk/drum setup not a disk/disk setup. Get rid of that first. I would run the front directly off the master and run an adjustable proportioning valve to the rear. Go and find a big parking lot (to be safe) and start playing with it. you want to adjust it to a point at where its before you get rear lockup and before you get front dive.

The other option is go to the junkyard and find a proportioning valve that is on a vehicle with similar sized disks front and rear as you are using. I was using one off a H1 (HMMVW) as that uses same sized front and rear. But that may be a little hard to find for cheap unless you know someone with some military scrap or works at a Hummer dealer :laughing:

Once you get it adjusted you will be able to tell if you need a master with more volume.

i hear a master from some later model firebirds is the ticket(disc/disc of course)... it may have the right proportioning valve in the cylinder itself, or at the outlets... then again i hear its a good swap for samurai guys. maybe not so much for jeepers. anyone else?