I have a 2000 jeep cherokee 4wd, with a rearend from a 97 grand cherokee. I had to change all four rotors calipers and master cylinder (lines all good and new flex lines) but i still dont have any pressure? Changed the master cylinder 2ce and bled all the brakes i dont know how many times. The front brakes stick but the rear dont. Any ideas?

 

Bled but have your flushed?

 

I am going to say that you adjusted the rear brakes properly?

 

Did you bench bleed your master cylinder?

 

Bench bled the mc yes, didnt try to flush it. Rear brakes are on properly.

 

Deleted.

 

Proportion valve good?

 

Calipers on upside down?

 

Is there a proportioning valve on these things or is it in the master cyl? I know on other vehicles you have to install a disc/disc prop valve if switching from a disc/drum set up. Otherwise the rear will not get enough pressure. If it's in the master did you get a master for the donor or a stock replacement for yours?

Max

 

Yes there is a proportioning valve. If you went from rear drums to disc you will need the one from a grand with rear disc. The internals can be swapped and it will do fine.

 

Yes its a drum swap to disk. Do you mean i need to get a mastercylinder from the year of the rearend swap? The rearend is a 97 grand cherokee.

 

No the master cylinder is same. It would just need a proportioning valve. But make sure that the rear calipers are on correctly and not upside down.

I just did an entire brake swap and upgrade on my 1990 comanche. I went to rear disc and had to get the proper proportioning valve to get the correct amount of pressure to the rear.

 

X2. Contact a member called BigDavid and see if he has one laying around or if he can get you one

 

I have a extra proportioning valve but I'm not too sure it will help. I'll give it to you, all I ask is you pay shipping. Less than $6 for a flat rate box from the post office or I can throw it in a envelope. Your choice.

 

How do you adjust disc brakes?