new brakes problem

[HeavyMetal]

Posting from my phone as we have no internet.

My other brakes thread here is the starting point for this.

Replaced rear axle...now fluid gets back there and i can bleed the whole system. Did that..disabled ABS as the new 8.25 is non ABS. Now the pedal has very little pressure and goes to the floor with minimal resistance when the jeeps on. Jeep barely brakes until the final 1/4 stroke..but it will stop for sure. Nearly no pressure the whole way down.

Added new issue: when pressing the pedal down i get a loud squeek/creak half way through everytime. Originating from either the master cylinder or brake booster. This did not happen before the axle swap and disabling of ABS.

No air in system at all when bleeding.

[92xjlaredo]

im sure you did but how about the vacuum line that goes to the booster off the manifold? possible leaks or messed up line?

[Ruepart Hoaxley]

Master was new and bench bled right?

Could be you need a non-abs booster.

[clean4drxj]

[/QUOTE]Could be you need a non-abs booster.[/QUOTE]

not likely.. it's a problem somewhere else..

[HeavyMetal]

I have never heard of anyone putting in a non ABS booster. The system is a safe fail aka when it'fails' (disabled) the jeep will just brake like a non ABS jeep.

[steveo]

if you switched from drum in the rear to disc you may have to change the master cyl. and i know it sounds stupid but i see this all the time at work. make sure the calipers are on the right sides. they can sometimes fit on either side. the bleeders have to be on the top. if the bleeders are on the bottom there will be air trapped at the top.

[HeavyMetal]

It wasnt drum to disc. The MC is new anyway

[CSaddict]

Did you adjust the shoes all the way out after putting the drums on? Were the self adjusters free and working? If yes to both keep bleeding it. Fill the master and run it all through at least once. Keep it full while bleeding.

[HeavyMetal]

Didnt touch the shoes. Is this a potential symptom?

[armadasx]

If the fronts are bad and the rear shoes/drum are worn it is a possiblity that is the reason.have the fronts been done recently?

[ninetysix-ex-jay]

Didnt touch the shoes. Is this a potential symptom?

They have an auto.adjuster on them if you drive in reverse and slam on the brakes they'll adjust out. Or use a brake spoon through the rear adjustment window.

[92xjlaredo]

hey Will, did you ever get this straightened out?...i have the VERY same issue now....pedal goes to the floor and wont grab till about the last quarter of the pedal, ONLY when the jeeps on though. when its off builds plenty of pressure...bled all 4 lines adjusted the slack adjusters all that happy shit. non abs 29 spline 8.25 rear in mine kind of confused now cause i put a brand new set of pads and had my rotors turned down professionally.

[CumminsJeep]

I would adjust the rears and go from there. if the shoes are way to far out they have a lot more ground to cover before putting ample pressure to the drum, thus giving you a soft pedal. does your brake go all the way up when you pull it up? if it does they are way to far out

[92xjlaredo]

I would adjust the rears and go from there. if the shoes are way to far out they have a lot more ground to cover before putting ample pressure to the drum, thus giving you a soft pedal. does your brake go all the way up when you pull it up? if it does they are way to far out

well i tweaked the slack adjusters spun them out till the drums wouldn't spin at all with the tire and wheel on and the axle off the ground. then i closed the adjusters just a little so that they would rotate and just barley touch the inside of the drum. no change to anything there. slack adjusters stayed where they were and the pedal still has nothing until it hits the last 1/4 pedal really confused right now because it only happened when i changed the front rotors and pads didnt even touch the rears

[CumminsJeep]

well i tweaked the slack adjusters spun them out till the drums wouldn't spin at all with the tire and wheel on and the axle off the ground. then i closed the adjusters just a little so that they would rotate and just barley touch the inside of the drum. no change to anything there. slack adjusters stayed where they were and the pedal still has nothing until it hits the last 1/4 pedal really confused right now because it only happened when i changed the front rotors and pads didnt even touch the rears

did u try bleeding the system?