Ok so I've never been stumped with my xj but this ones got me. I did a break job awhile ago, ( new calipers, pads, shoes, drums, and wheel cylinders.) I got the front to bleed out just fine but the rear is the real problem. I crack the bleeder and I get min fluid. Even with someone on the pedal. So I buy one of those handy little vacume bleeders.. Same thing. I figured it was the master cylinder, replaced it, nothing. I'm stumped, maybe the wheel cylinders are junk? I don't think it's the booster cus it's not a stiff pedal, nor is it overly soft. Help me out!

 

The rears can be a pig to bleed i had the same prob just had to keep bleeding it it took ages but finally got there

 

Since you completely drain the system out, its going to take awhile. Just keep going from side to side in the rear to get all the air out. Its always a pain when you let the system drain completely out

 

it could be the rear differential junction block.

 

Was this ever resolved? What was the cause?