Telling the difference between ADM and JDM proportional valves

[jamekins]

Car -AE86

motor -4AGZE

use -Street

problem -need to identify proportional valve

occurs/started when - n/a

personal situation - I've just purchased a t-series diff with discs to replace the s-series in my AE86. I know I need a JDM proportional valve to make sure I have the right brake bias and I got the one that the previous owner was using with the diff but I'm not sure if its ADM or JDM. It has what looks to be a part number on it that reads:
3c1
12020

Now according to site the part number is 47190 - 12020 for the ADM part. This seems like I may have an ADM part and it may have been gutted to get the correct bias but I'm not sure. Can some one confirm this for me?

[evil86]

jdm proportional valve are 2 piece and adm are one piece. they look different, but mechanically are they different?

[Sam-Q]

well if it has a disk rear end it has to be different

[reecegze]

i wouldnt think there be much difference between the two, might seem stupid but i am running r32 master cylinder with pug/hilux/corona setup FRONTS and r31 disc rears, Using the ADM proportional valve and it seems to work perfect. Anything wrong ?

[jamekins]

Nothing wrong yet I just don't want the back end locking up all the time which is apparently what happens if you have the wrong prop valve.

[H8CHIR6KU]

i did an engine conversion on a ae85 and it had the 2 peice prop valve same as my disc rear end. the brake bias on that felt the same as any other drum rear end i have driven.