ive got an 88 iroc w/ drum
putting in a disc rear end from a 86 or 87
i know the Proportioning valve is different & the e-brake cables are too (anyone know the part #'s or what years to look for to get the right ones?)

my question is will a Proportioning that i had bought previously for my 85 work ?

thanxs

edit checked with a dealer, 85 is 1 year specific only, but any info on the e-brakes would still be appreciated

 

i wanna do the same thing.... someone help us out...

 

Posted in this thread WAAAY back when I was a Noob:

https://www.thirdgen.org/techbb2/sho...153#post342153

"OK, prop valves now.(All GM P/Ns FYI..)

82-85.....................14075706
82-83 RR Disc.............25511944
82-83 EXC RR Disc.........25515423
84-85 EXC RR Disc.........25517738
84 RR Disc................25517739
84-85 JE1.................25517740
85 RR Disc J65............25521985
86-88 J50.................14089495
86-87 JE1.................14089496
86-88 J65.................14089497
89 J50 2ND Design.........10136839
89 J65,1LE 2ND Design.....10136840
89 J65 EXC Y82,1LE 2ND Des.10136841
89 J50 1ST Des.............14089495
89 J65 EXC 20TH Ann Y82,1LE 1ST Des..14089497
90 J41,J42................10136839
90 J65,1LE................10136840
90 J65(EXC 1LE)...........10136841
91 Cast Iron Brk Sys J41
Alum Brk Sys J42.......10136839
91 J65 4 Wh. Disc ........10164112"

For your '88 with the old Moraine iron calipers you'll need prop valve # 14089497. I have one if you want my old one you can have it for $20 shipped, I went to 1LEs and used the 1LE prop valve. However, in any case, I STRONGLY suggest rebuilding your calipers with the recall kit since they're probably frozen up and will NOT work right without installing it. Another option would be to install '89-97 PBR brakes and avoid the iron calipers all together.


Ed

 

well after checking with 2 dealerships & still not having a definative answer, ill take the prop valve, just in case
PM me with where to send the $$$$
thanxs Shawn

 

If anyone needs stuff for their conversion, I have a complete setup off my 88 GTA. Car has 65k orig miles, and the rear brakes worked pretty good, and even the e-brake would hold. Have calipers, good rotors, new pads, backing plates and even e-brake cables. Will have a prop valve as well. willing to let it all go cheap since it will just be taking up space now. If not, oh well, it will just collect dust I guess.

Terry

 

are you willing to sell parts seperately?
f so i need the e-brakes, from the caliper to the splitter

 

I just converted from drums to disc and I haven't gotten around to changing my proportioning valve yet.. but honestly, the car stops great with out changing it.

 

I have the e-brake cables, M/C and proportioning valve (J65), calipers (with e-brake rebuild kits) and rotors from my conversion to PBR's. All functioned perfectly when removed from my 85 IROC. Taking up space in the garage. Make me an offer.

JamesC