Brake part I.D.

[Cdaniel]

From a 77 FJ40. Rear brake circuit. Prop valve?

 

[brian]

yes yes it is.

 

[inkpot]

Usually hangs off the bottom of the booster?

 

[Cdaniel]

Usually hangs off the bottom of the booster?

Yessir. Now bypassed in lieu of rear disks.

 

[Blue77FJ40]

Yessir. Now bypassed in lieu of rear disks.

You don't want to bypass the stock proportional valve. i'd put it back in. Plus, you want to add an aftermarket proportional valve like the attached pic. What you want to remove is the stock rear residual valve.

There are a number of RDB threads that can explain all this.

 

[Cdaniel]

You don't want to bypass the stock proportional valve. i'd put it back in. Plus, you want to add an aftermarket proportional valve like the attached pic. What you want to remove is the stock rear residual valve.

There are a number of RDB threads that can explain all this.

The residual valve was already MIA in my master cylinder. And the majority of RDB examples I've seen don't have the OEM prop valve in the circuit. Can't see needing two unless the adjustable one can't cut it.