which proportining valve for my car help
Thread Starter
Junior Member
Joined: Jun 2010
Posts: 82
Likes: 0
From: long island
Car: 1992 rs stock for now
Engine: 305
Transmission: auto
which proportining valve for my car help
i have a 92 rs with drum rear and im swaping in a 88 iroc rear with disc should i use the proportion valve from the 88 or buy a valve for a 92 with disc /disc 
Last edited by JamesC; May 5, 2011 at 08:46 PM. Reason: Slip of the finger
Joined: Aug 2006
Posts: 12,812
Likes: 110
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: which proportining valve for my car help
the fitting sizes on the valves changed somewhere in the late 80's, get a 92 one to be safe
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: which proportining valve for my car help
The 88 combination valve, which is correct for the rear in question, won't fit the threads of your 92, and the 90-92 disc valve is for PBR's (11.7" rotors and single-piston alum calipers). I'm unsure of how the increased bias of the latter might affect braking. And as you may recall, there's an parking brake cable problem as well. If you could locate one, the 89-92 (or even a fourthgen rear) disc brake rear end would eliminate the above problems.
A gander through the 10-Bolt FAQ may be helpful:
https://www.thirdgen.org/forums/tran...-10-bolts.html
JamesC
A gander through the 10-Bolt FAQ may be helpful:
https://www.thirdgen.org/forums/tran...-10-bolts.html
JamesC
Last edited by JamesC; May 6, 2011 at 06:13 AM.
Junior Member
Joined: Nov 2008
Posts: 89
Likes: 5
From: TN
Car: 92 Camaro Z28
Engine: ZZ4 TPI
Re: which proportining valve for my car help
I have done the same swap on my 92 z28. I used the 90 - 92 valve from a 4 wheel disc car. I can suggest 2 things to do on this swap.
1 get a GM PN 18019028 Caliper, repair kit from gm parts direct or flynbye
2 do some reading about the calipers on this site there is alot of info about them on this site good and bad
1 get a GM PN 18019028 Caliper, repair kit from gm parts direct or flynbye
2 do some reading about the calipers on this site there is alot of info about them on this site good and bad
Last edited by profootbrake2; May 6, 2011 at 03:53 PM.
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