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Old 01-12-2004, 11:55 PM   #1
GinoEJ253two
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Default R160 to R180 GC8 Chassis

anyone ever try this for the new sti diff?

is it feasable?
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Old 01-13-2004, 02:39 AM   #2
supermoose
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yeha, it will fit with the proper axels and hubs. one guy did it outa GDB parts. the V4-6 STI cars were avalible with the R180 rear end and hubs and such.

h
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Old 01-13-2004, 10:46 AM   #3
Jaxx
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yep the moose is dead on the RAs came with the r180 difs

its an expensive swap as it requires the diff,hubs,axels,2 pot rear brakes and 2 pot rear discs
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Old 01-14-2004, 08:45 AM   #4
GinoEJ253two
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great

i have a GM6 (us rs25)

and i was worried the driveshaft was different.
but if they are the same.. then now all i need is an sti RA rear clip... LOL
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Old 01-15-2004, 08:39 PM   #5
serious
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So, could you use the new age sti parts instead on getting the older gc series parts? Another words take the hubs/driveshaft/brembos and the r180 out of a 2000+jdm car or usdm sti and put on a gc or an older legacy?
brent
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Old 01-16-2004, 12:46 AM   #6
Soon2Bgreat
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Ok, here's what i know about r180 into a gc8. I will hopefully be doing a variation of it this weekend. First some facts.
-r180 is larger than r160 (duh)
-r180 gdb wagon axles are shorter than gdb sedan ones (this accounts for the shorter track)
-You can fit gc8 brake hubs and r180 diff to gdb axles, and vice versa (must keep same ratio in rear diff. though)

Now to swap in a gdb sedan "rear end" (into a gc8) you will need the r180 diff, axles, brake hubs and trailing arms and lateral links. If you have this you will have a wider rear than front, which is why i'm not going this route. Some solutions are.
-Use a gdb r180 wagon rear end, they have shorter axles needed. (so no need for trailing arms or lateral links, keep same rear track)
-Use gc8 rear end, must change ratio to 3.9 with 6mt.

Another option is to get the wider track out back, and equalize it up front. I've not come to clear conclusions but it seems you'd need control arms, xmember, swaybar, axles. I am not sure if this will work without problems on the front.

I hopefully will find a v7 wagon rear end i can buy or trade for to use in my gc8 as i don't like the idea of a wider track in the rear. Good luck and let me know if you find v7 wagon diffs, axles or hubs, (any or all parts, lol.)
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Old 01-16-2004, 12:54 AM   #7
garface
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Why don't you want a wider rear Louis? If you have the opportunity, I don't think there should be any negatives besides clearance. Would there be any bad affects handling wise? Also, I'm pretty sure that you can use the longer axles in a GC without a problem. The axles have enough play in them to fit them in. You doing the full 6 speed this weekend?
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Old 01-16-2004, 01:00 AM   #8
Soon2Bgreat
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Well i'm worried about a few things. The wider rear may not be noticeable much i don't really know. I can only imagine though it would lead to more understeer (might not be noticeable though)
Also in the rear i was rubbing with my wheels, i can imagine it would only get worse. As far as the axles compressing. They may fit, but i don't know the possible side effects of doing this. I think downshift1 did this in his wagon and then took it off for some reason (forget, but i think it wasn't the best solution) I may end up trying it just to see how it works this weekend, and keep looking for a wagon rear end.

Actually i will try to compress the axles as i think you just use your stock trailing arms and lateral links when doing this, this would also keep the smaller rear track.

You're welcome to drop by if you want, i'll let you know when i start, i'm not sure i'll finish though as i think the install will be harder than i think. I'll have to hammer the tunnel i think as i don't have an engine hoist, not a big deal i guess, but im sure this whole r180 thing won't be as easy as just a few bolts. But we'll see.
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Old 01-16-2004, 01:21 AM   #9
garface
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Yea, I thought about the axle thing, but it's worth a shot as a temp solution. Are you doing it Saturday or Sunday? How many people do you have helping? I've heard the tranny tunnel hammering is really minor and shouldn't take more than a half hour. Even though rallispec quoted me 5 hours extra work for the tunnel modification a while back. I guess that's before they ever actually did one. I'd love to stop by if I'm not busy. Let me know. I'm starting to consider doing a 6 speed swap. I'm starting to get the parts together, but don't know if it's worth it. I figure after selling the Ver. 4 tranny it won't be too bad. And if your install goes well then I really might do it. Later.
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Old 01-16-2004, 01:27 AM   #10
Soon2Bgreat
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probably start sunday finish monday. People helping I wish, as of now it's you and dave (cronic) lol. Not to mention i gotta take it out of the v7 im getting, not to mention i gotta get the car off the trailer first of which i've no idea how to do that. Yea i'm a mess right now, but i'll figure somehting out. Point being hopefully tuesday we'll know for sure if the axles will work.
P.S. I've read from downshift the wagon and sedans use the same axles, diff and hubs. I can't imagine how that would work, while i was told by verIII that the track difference is due to axles. I'm inclined to agree with verIII, but who knows. Also ECS i think is using sedan rear axles in his wagon, not sure what his front setup is. I will have to talk to ecs and downshift personally i guess. Eh it's late i think im rambling and im going to bed, Good night fellas.
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Old 01-16-2004, 01:38 AM   #11
garface
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Hmm, well the axles themselves can't do anything to track width. When you say hub, do you mean the whole spindle? Maybe that's where the difference is. I thought the GD's are only like 5-10mm wider, could be wrong though. As far as getting it off the trailer, that really sucks. I think you have it cut in half right? I had a front clip once that weighed 1200lbs so that's not gonna be fun. I had to have a flatbed tow truck pick it up and move it for me. If you had enough people it could be done. I dunno. We'll talk later.
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Old 01-16-2004, 02:08 AM   #12
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HAHA Make sure i am there when you take the front off the truck, i am sure it will be good for a laugh I cant wait to see that thing! Remind me to bring a camera!
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Old 01-16-2004, 02:15 AM   #13
GinoEJ253two
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i hope it works out..
i want to replace my rear end with an r180 too.
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Old 02-16-2004, 09:51 PM   #14
serious
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I'd like to know where the difference is too. I'm thinking about this into my bd legacy, which is the same as the rs/gc cars.
Brent
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