LBEXJ
NAXJA Member #721
- Location
- Parke County, Indiana
Just got done doing an axle swap in my son's 87' MJ. Installed a Dana 30 in the front, 8.8 in the rear. (Disk Brakes) We are using the stock calipers from both axles, all four calipers were dry. We also replaced the brake line on the 8.8. Heres where I ran into problems:
First we bled the brakes the old fashion way (2 people) could not get any pressure what so ever. Replaced the master cylinder; Bench bled and installed. We figured it would fix the problem. Unfortunatly we were blessed with no brakes again. We could get a little pressure with the engine off but when the engine was started, it was a different story.Brakes went to the floor.
Came to the conclusion that there was still air in the lines, so my son went to his Automotive class and got a vacuum bleeder, unfortunatly with it we could not tell when we were done bleeding since the air travels around the threads of the bleeder screw. Ended up where we started slight brakes when engine is off, but as soon as we start it, We have nothing.
Could we have a Brake booster problem? Or is there something we are overlooking.
Thanks
Les
First we bled the brakes the old fashion way (2 people) could not get any pressure what so ever. Replaced the master cylinder; Bench bled and installed. We figured it would fix the problem. Unfortunatly we were blessed with no brakes again. We could get a little pressure with the engine off but when the engine was started, it was a different story.Brakes went to the floor.
Came to the conclusion that there was still air in the lines, so my son went to his Automotive class and got a vacuum bleeder, unfortunatly with it we could not tell when we were done bleeding since the air travels around the threads of the bleeder screw. Ended up where we started slight brakes when engine is off, but as soon as we start it, We have nothing.
Could we have a Brake booster problem? Or is there something we are overlooking.
Thanks
Les