Gentleman,


Converted rear drum to disc using a complete Teraflex kit 4354420/4354400. Braking seems to be the same . Do I need to install a adjustable brake proportioning valve. Tire sizes are only 30" 2" lift kit, What else can I do?

 

That's strange. The JY conversion I did on the 88 was very noticeable.

But, I swapped the prop valve guts from a ZJ into my prop valve.

 

Did your 88 have the single or double booster Cruiser ?

 

Single.

 

If the terraflex kit did not come with a new proportioning valve, you need to get one............
The factory XJ valve limits the majority of the brake pressure from going to the rear brakes..........By design, drum brakes require very little brake pressure compared to disk brakes.........By using the limited rear pressure from the stock valve to try and operate a disk type caliper, you would have less braking power at the rear than if you kept the drum brakes.......

 

Who's/What type of proportioning valve do I need?

 

I did the booster upgrade still on drums big difference...

 

Just use internals from a 4 wheel disc ZJ in yours.

 

READ.....http://www.go.jeep-xj.info/HowtoPvalve.htm

 

I beg to differ. Every disc swap I've done without changing the prop valve, the back brakes work too good. Without the prop valve change the back tires on my jeep and my neon lock up before the front. That's the only reason I see for changing the valve.

But I noticed a nice difference in changing to disc.