Kia ora mate, I’m living in Auckland, where about you?
Good old windy wellinton
Nice to meet you, we got exactly the same 1991 red manual vr4 
hi yes we do , mine is kind of standard , only changed air filter and exhaust . give us a ring if u like .
i have workshop book for car
021 212 3662
@Pken Really nice work and thanks for sharing it with us! 
I know, this is an old thread, but do you know the dimension of the o-ring which sits in the cap (that thing with the threads)?
Currently I’m assuming it is just a regular o-ring, am I right? If so, this should be found in every hardware store or well sorted o-ring boxes/product ranges/assortments.
Right now I’m sourcing the gaskets for my rear steering rack revision and this o-ring would be the last missing part.
Best regards,
Syles
Hi Syles, apologies for late response, just saw your post. I dont know the dimension, but all of the gaskets are available here, this link will take you directly to the steering rack, then just scroll down best of luck with your project.
Thanks for your answer, unfortanetely, your link directs to the front steering rack 
But nevermind, I managed to find the answer, the o-ring should have the following dimensions:
- inner diameter: 38 mm
- outer diameter: 42 mm
- thickness: 2 mm
It should be the same as for the inner o-ring of the piston.
Best regards
Syles
Pken,
I’m in the process of refurbishing a GTO rear unit for my US car (the GTOs built Dec 1990 and later got a different system; the GTOs built before Dec 1990 had the same system as the US cars). So far, what I’ve found different is that the US cars (and early GTOs) have a smaller hydraulic cylinder in the rear steering rack and also do not have the self-centering return springs (it’s just a hydraulic piston basically). So, I think operation angle is about the same for the 2 versions (roughly 1.5-2degress of movement on the rear wheels); however, I think the GTO version might be more stable (I’m thinking it won’t pulse like the US version does).
Anyhow, one of the things I was looking to do, is get the sticker label for the rear rack for the GTOs remade; however, the GTO system I have didn’t come with one. I had this done a few years back when I refurbished my US system; but, while I have the part number for the GTO rear rack, the part number that shows up in ASA for the US version does not match the part number that was on the original sticker from my US rack (so, in turn, I think just changing the part number to the GTO version won’t be as authentic). So, I was hoping you may still have the sticker and can send me an image of it or maybe you took a pic when you removed the unit from your car (I see it in the pic when you show the rear rack on the subframe)?
Oh, and one additional question; inside the endcap, and the end of the tube for the rear rack, are small thin bearings/bushings. I think these support the drive piston rod on the ends to prevent scoring and allow for smooth operation. Did you source a replacement for these? I didn’t when I rebuilt my US version as these were good; however, the bushing on the endcap from this GTO unit I got was a bit eaten up (I had a heck of a time getting the endcap off the piston rod for some reason so I think that contributed to the damage to the bushing).
@Pken I meant to tag you in my previous post and just realized I didn’t manage to do so; looks like I can’t edit the post any more and my account seems to be too new to send direct messages (or, I’m not familiar enough with the platform to know how). You can look me up on 3Si if you’d like (same screen name); I’ve been in this platform for quite some time.
Hi there, Unfortunately the sticker that was on my rear rack was completely illegible and so i removed it before repainting my rack. I bought replacement bushings locally in Dublin, I dont think that they should be hard to get. Have you tried the usual sites for the bushings like Amayama, Rock Auto or Partsouq.com Or an online Mitsubishi dealer, there are a few. If you enter a VIN number for a GTO it should give you the part numbers. Hope this helps
Also, if you have trouble sourcing those bushings. I have been told that the oil seal bushing on the Mitsubishi Galant 7th Generation are the same. Part number for those were MB949339. But be aware that I cannot confirm this as I have not purchased them myself, but it may be an avenue you could explore if you are really badly stuck.
@Pken, thank you for the response. I’m disappointed to hear about the sticker as I’m trying to be as authentic as I can with mine as I convert it to the GTO system. Maybe I can find someone here in the states with a GTO who will be able to get me a pic.
As for the bushing question, there seems to be some confusion or miscommunication. My question pertains specifically to the rear steering rack. Of which, ASA does not list any serviceable parts outside from boots and end links for the most part:
And, you’ll have to bear with me, since my account is new, I have to break my response up into multiple posts to add the photos individually. I apologize for the spam in replies.
And, I have all versions of ASA, so I’m able to look up the part numbers so that’s not an issue. The bushing I’m referring to is specific to the rear rack, there is one inside the end cap and another on the opposite end of the rack housing (the small end) and is a guide for the steering rod inside (for what I assume is to prevent scoring of the rod during rear steering operation). When I removed the endcap for this GTO rack, the bushing was scored from what I think is a poorly made steering rod inside the rack (like the end was too thick to push through the bushing, it was a chore to remove the end cap off of the steering rod; my US one when I disassembled/reassembled it a few years ago, didn’t have this problem). Here is the bushing I’m referring to:
EDIT: And, I seem to have hit my response limit in this thread due to my account being new, so I wasn’t able to complete the rest of what I wanted to provide, with pics (admittedly, it was quite a bit - I had 10 more images I wanted to share, but it provided a lot of clarity and comparison to what I’m doing).
Hi Almos
So you are looking for this seal as per picture attached in blue. I took my old seal to this Company www.Hydraseals.ie which was about 20 miles from me. And they had off the shelf seals that matched the diameter and thickness of my own. I would assume that you would have a similar supplier or outlet there that you could try.
@Pken No, I found the SKY-18N o-rings during my first round with this (I have a picture to add later in my diatribe that shows the markings on the back side of the o-ring with this label so that’s how I refer to them). My whole response would have made more sense if it were not for the limitations placed upon my account (I get why they’re there, but, it is really impacting the conversation).
So, following up from my last post, here was the next bit. Again, I’m specifically asking about the bushings in the ends of rack. These do not seal but prevent scoring of the drive rod inside the rear rack.
Unfortunately, the bushing got a bit mangled upon removal. I tried to press it out from the other side (outside end) but the opening is smaller diameter than the outside diameter of the bushing so any tools I used to press on it actually slipped inside the bushing exacerbating the problem. This also meant I couldn’t press it through the end cap; so, I pressed it in slightly, deformed the inside a bit to create a lip, and then pressed it out the way I had intended (it came out from the inside of the end cap):
I’ll add a couple more responses below which were typed out before as part of my response train yesterday. Again, these were all meant to be part of the same post to provide context to what I’m asking.
NOTE: I found your method of removing the end cap a bit more inventive than mine; I simply cut up a socket to turn it into a 2-pin spanner which I could hit with an impact to get it apart.
When I refurbished the factory rear steering rack on my US car, the sticker was in ok shape and showed that KYB made the rear steering system; I reached out to them at the time to ask if they provided any sort of replacement parts for maintaining the system. What I got in return was basically that they didn’t and considered it proprietary (so, I was on my own). Here is the replica sticker from my rear steering rack:
I think your best bet here at this stage is to reach out to Joe by private message who owns this site.
He has several GTO’s and by chance he may just have a rear rack that is beyond repair but the part your looking for may be salvagable.
@Pken what is Joe’s screen name? When I searched the Users list, there were 8 folks with the name Joe and I wasn’t sure who was the site Admin (I’m assuming it was Joe90 but I wasn’t sure and would prefer not to bother someone unnecessarily).
Continuing where I left off; again, only trying to provide the full scope of what I’m working on and to provide you guys (at least for those interested and still reading this thread) the differences in the 2 versions of the AWS system.
You’ll also notice that the part number on the sticker I showed earlier, which was made off of my original one, does not match what ASA shows for the rear steering rack for the early GTOs; GTOs built between September and November 1990 share the same system as all US cars; afterwards, the GTOs got the system you have (funny enough though, all the Euro 3000GTs got the later GTO system as well - according to ASA):
EDIT: I found the discrepancy in the part numbers. I have an old .pdf of part listings I think Mitsubishi provided dealers for quick reference (not sure why I didn’t look at this before); perhaps it pre-dates CAPS (the predecessor to ASA). Anyhow, it says the rear steering assembly for 91-94 USDM 3000GT VR-4s is MB631733 (the number I had on the original sticker) and that for 95-99 USDM 3000GT VR-4s, it is MR131808. The weird thing is, while my car is a 94 Stealth, I replaced my original system with a setup from a 98 VR-4 due to excessive corrosion (this was some time in the 2006/7 timeframe). When you search in the US version of ASA, you only get MR131808 as the part number for US rear steering racks for all years; so, I think they did a database/part number update which removed the old numbers (again, a guess on my part). So, this at least confirms part of what I think happened; I just don’t know if the same change was made to the part numbers associated with the GTO’s rear steering system (hence my OCD having me go around asking folks for pictures of their original GTO’s rear steering rack sticker).