Master cylinder/booster ??

[Petescj]

Will master cylinder and booster from a 80s Cj with front discs work with a Cj that has 4 wheel drum brakes? I say yes if the drum brake proportion valve is used. Thoughts? Am I correct in my assumption?

Thanks in advance. I want to make sure before I sell it to someone and it ends up they cant use it.

 

[Purple77CJ7]

The disc master cylinder does not have residual valves in it for the front brakes. Drum brakes require the residual valves. The booster will work.

 

[Petescj]

Thanks for the info.

 

[tarry99]

Will master cylinder and booster from a 80s Cj with front discs work with a Cj that has 4 wheel drum brakes? I say yes if the drum brake proportion valve is used. Thoughts? Am I correct in my assumption?

Thanks in advance. I want to make sure before I sell it to someone and it ends up they cant use it.

Pete:

Purple is correct on the Residual Valves.........the MC Bore sizes will be different between the Disc / drum normally 1.125" or 1.250" and drum / drum usually 1.000"...........Should work fine just may be a little short on pressure.
What is it going into?
And was it a Power brake or Manual non power setup before?
Pedal ratio's are different between the two on the Factory Jeep swing pedals.