brake problems on a tj

[gary78bronco]

My friends and I stretched and linked a tj and put a dana 60 front and a 10.25 rear in it.

the problem he is haveing is that he does not have enough rear brake.
Were wanting/needing a cheap easy fix for this? Is there one or not?

We have looked into a adjustable proportion valve but were told that on the jeep's the proportion valve is in the master cylinder. is that true are did we get feed full of bs.

before u smash a noob I did search just didn't find what i needed.

thanks for the help in advance

 

[Milner]

Is the rear still drum brake?
It is likely that you need a mc with more volume. The calipers on that 60 and even the wheel cylinders on the 10.25 are a great deal bigger than what the jeep had stock and require more volume. Cheapest fix would be to adapt a mc from a 3/4-1ton Ford truck....

 

[Caleb]

or a residual valve to hold some pressure for the rear. If it were me I'd do what Milner suggested, but the residual valve would be cheapest (they are onyl a couple bucks each. You can get them from most race shops (Summit Racing, etc)

 

[gary78bronco]

the rear are disks. I will look into the residule valve.
thanks guys.

 

[gary78bronco]

thanks guys

 

[Milner]

the rear are disks. I will look into the residule valve.
thanks guys.

If the rear is disk they need A LOT more volume then the stock MC has. Compare the calipers....Look for a MC from a superduty with rear disks. A residual valve my help, but with the big calipers in the rear, an new MC is the only real good solution....

 

[BCGPER]

I think Milner's recomendations are right on the money. My guess would be lack of volume more than lack of pressure. Asuming of course everything was installed and purged of air correctly.

If you do go the residual valve route, make sure you tell them you have rear discs. If I remember correctly, disc valves are set at 2psi, whereas drum valves are set at 10psi.

 

[waynehartwig]

Don't use a residual valve - unless your master cylinder is under the floor, which it's not.

I think you have air in your lines or etc. Bleed your brakes again.

I have 1 ton brakes on my TJ (stock F350 front and large GM in the rear) with the stock master cylinder and can easily lock them all up on pavement at 40.

The prop valve is not in the MC.. Look just under it, you will see a solid block with several lines and wires coming out of it - that's the prop valve.

If you feel you need to upgrade the MC, get one from a 00 2500/3500 Dodge. It will bolt right up, but you will need to make the striker? (the pecker that sticks out of the booster) about 1/4" longer. If interested, I can get you the part number. In fact, I have a brand new one here that I will probably never use that I'll make you a great deal on...