I know there are master cylinder upgrades for the older years, but is there an easy upgrade for a 2000? I think my MC is going bad because if I push it quickly I've got good brakes, if I push it slowly it doesn't do anything for the first couple inches and if I push it quick then come up then back down its firm still. If thats not the mc I'd be interested to hear your ideas. If it is should I just replace it or what could I upgrade it with?
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Late model master cylinder upgrade?
- Thread starter Dest
- Start date
Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
Is the rest of your brake system stock? Does the pedal sink under constant pressure? Whats is the behavior with the engine off?
danny Benavidez
NAXJA Forum User
- Location
- Texas
...bump.. I also like to know about a better master cylinder for my 2001 XJ. I have already swapped over to rear disk brake. But the brake seams soft at times.
Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
Did you do anything to your prop valve?
danny Benavidez
NAXJA Forum User
- Location
- Texas
I tried to 
I read along on naxja that a RED prop valve from a ZJ will help. But all I can find are the yellow ones. I already have a yellow one in my 2001 it's stock.
http://i32.photobucket.com/albums/d24/ExpeditionXJ/HPIM1795.jpg
http://www.naxja.org/forum/showthread.php?t=84633&highlight=proportioning+valve
I read along on naxja that a RED prop valve from a ZJ will help. But all I can find are the yellow ones. I already have a yellow one in my 2001 it's stock. http://i32.photobucket.com/albums/d24/ExpeditionXJ/HPIM1795.jpg
http://www.naxja.org/forum/showthread.php?t=84633&highlight=proportioning+valve
Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
I don't know if the color is that much of a determining factor. What you want to look at is that spring.
danny Benavidez
NAXJA Forum User
- Location
- Texas
As the color changes so dose the diameter of the plunger. I have a silver and yellow one with me and the yellow one is a hair bigger in diameter.
- Location
- Minneapolis, MN
Late model XJ's already have the best Master Cylinder available. If you think you need better brake performance, upgrade the quality of your pads/shoes and rotors/drums or look into the WJ brake swap. Installing steel-braided brake lines will reduce some of your brake pedal mushiness.
