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Posted

Does anyone have the part number for the Rear brake distribution valve?

 

The number on Chris' TPS Garage site *18015258* doesn't show up on GMPartsDirect. I put it into PartsAmerica's page they showed it and we ordered it but they can't get it either? ACDelco doesn't even show the number on their site either?

 

ACDelco did show this part as it 18M875, it says its right but PartsAmerica wants $186 for it. :shock: Thats a lot of mula on a "hope" it is right?

Posted

I was under the impression that the rear proportioning valves were built into the master cylinder.

Posted
I was under the impression that the rear proportioning valves were built into the master cylinder.

 

As taken from his site...

http://www.tpsgarage.com/TGP/brakes/powermaster.htm

 

Rear Proportioning Valve

 

Rear Proportioning Valve. This one leaks. Only '89 and '90 w-bodies with abs have this. Part number GM 18015258

 

All others (88-95ish) even with ABS (91-95ish) don't have it since they use a dual-diagonal setup; there will only be a connection between the front and rear lines here. Proportioning on these units is done internally in the master cylinder.

 

 

brakepropv.jpg

Posted

Hmm....I definitely learned something by reading this. I thought all Ws were internally proportioned.

 

http://www.rockauto.com has the valve for $141. Still alot of cash. Might be something where you try a junkyard valve first before spending the cash on a new one.

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