gon4lo

I have a 97 XJ with a 6.5 rc lift.

My issue is that I can not get fluid to rear axle. I checked the mc and it is pumping it out there but it is not getting past the combi valve. From what I have seen this seems to be a common issue. My question is two part. First is the oem valve mod of removing the o-ring an option to fix this? And secondly if the answer to my first question is no, what are my alternatives?

Thanks in advance.

freegdr

the modification of any part in the brake system should never be done first off ...have you tried to gravity bleed the rears ??????

gon4lo

Ive tried to gravity feed, vaccum, and just about everything else under the sun to get the juice to flowing.........and nothin'. Can not get it past the portioning/combi valve. pumps fine from mc to valve but the buck stops there. Front brakes are working great just no rears or e brake.

freegdr

e brake is cable controled will not have any thing to do with fluid ,i would remove the valve and see if theres gunk in it

freegdr

have you cracked the line coming off the valve to the rear brakes to see if fluids coming out of it?????

gon4lo

Yes and yes. I know it's cable but need to get fluid there before I adjust the shoes.

freegdr

adjuting brakes has nothing to do with fluid ,you should adjust b4 bleeding

freegdr

if your getting fluid out of the valveat the rear line connection nex place to check is where the rubber line connectes to rear axle and tees off to each rear brake

gon4lo

New line from combi valve to rear axle and braided line to diff dist block.

Valve is not moving when brake is pressed. Got new one this morning. $106 yeouch!!!!!! And still have the same issue. So everything is new and bleed correctly but yet still have no fluid going to rear of this thing.

gon4lo

Spent the day trying to figure this out. Still nothing. Anyone got any ideas? If not I am going to have to do something drastic to get it working and would like to fix what comes in it stock to save the cash.

freegdr

you do not have anti lock brakes correct bleedint them requires scan tool according to thishttp://www.jeep4x4center.com/jeep-se....swf#toolbar=0

gon4lo

No anti lock. Truly about to throw in the towel and admit defeat. Lol

gon4lo

Guess everyone is like me and don't have a clue. Lol

Veeb0rg

Sounds like a clog or a pinch in the brake line. Does fluid pass from the MC to the proportioning valve? Unscrew the line and see if fluid makes it that far.

If it makes it that far, then unbolt the line that runs to the back of the jeep and see if fluid leaks out of that port. If it leaks there then disconnect the rubber line at the back of the jeep and see if the fluid makes it that far.

Keep following the system till you find a point where it stops.

gon4lo

Well I figured it out I think. But it really does not make much since to me. Went to a local 4x4 shop and talked to the old guy that runs the joint. He asked if I looked at the front brakes closely. I said yes but he got me thinking. So back to my shop and another tear down of the front. Cross refrenced the casting numbers and found that the front calipers are from a GC. So Tolked to old guy again and recomended swaping in the GC Combi valve. Insto Presto fluid to the rear. So now I wondering WTH arent the GC calipers almost identical? And why in the heck did the PO swap front and not the rear as well? Oh well at least now I have brakes at all 4 corners.