anthrax323
NAXJA Forum User
- Location
- San Antonio, TX
I was fortunate enough to find a set of rear disc brakes off a 2004 KJ (Liberty) for $200 in excellent condition locally (pads and all, including Bosch rotors), and dedicated today to getting everything installed. This topic is sparsely covered and has many opinions/options, so I figured I'd write this up for the future reference as others (especially as more and more KJs will find their way to pasture in the coming years).
What you need
If you want pics of any aspect of it, please let me know and I'll get them up.
What you need
- KJ backing plates (and E-brake hardware)
- KJ axle flange studs (splined, hammer out with a mini sledge)
- KJ rotors
- KJ calipers
- KJ parking brake cables (rear L/R only)
- XJ front wheel studs (x10)
- WJ rear brake hoses/soft lines
- XJ hard lines are threaded 3/8-24
- KJ caliper banjo bolts are threaded 3/8-24
- KJ brake hose blocks are 1/2" thick, as are the WJ's
- Brake lines must be bent rearward (180 degree U in my case) and soft lines must be routed down-and-up in order to clear the caliper bolts and bleed valve
- KJ soft lines cannot be used, as they are permanently fused to the hard lines. I have not examined the 2006 model which is rumored to have threaded unions, so that is a possibility.
- The E-brake cables are a direct fit, and the driver side is indeed far longer than it needs to be. If you don't want to have a custom cable made (or have it shortened), it can be looped in the space near the shock crossmember.
- TeraFlex sells soft lines specifically for this application, including weld-on tabs for the soft-to-hard line union for around $80 (and based on pics, I genuinely believe their kit uses KJ parts). WJ lines cost about $12/ea.
- Modification of your proportioning valve is not necessary. Brake power is perfectly balanced front to rear.
If you want pics of any aspect of it, please let me know and I'll get them up.