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Old 07-30-2003, 01:10 PM   #1
AJS
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Default Rear Lateral Link

Kids

Does anyone know if WRX trailing arms and lateral links are the same from a GC8 to GDB? I heard yes, but I wanted to know if anyone knew for sure.

Thanks

Andrew
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Old 07-30-2003, 01:52 PM   #2
stimpy
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Trailing arms yes, lateral links no. The lateral links have two different sizes: one for the GG/GC/GM/GF chassis, and one for the GD chassis.

I personally have the STi trailing arms purchases for a WRX wagon on my GF.

-Jon
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Old 07-31-2003, 12:58 AM   #3
tbd
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hey jon,
i've been wondering about the track differences. d'you figure that the changes are in the arms or the knuckles? and what about axles? do the old axles have enough spline to make up that 5mm on sedans or will sedan axles fit on our track? anyone familiar w/ compatibility?
tony
following your swap progress. good on the mc info.
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Old 07-31-2003, 01:21 PM   #4
stimpy
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Knuckles, as far as I'm aware, are the same. I have the 2002 WRX sedan rear hub/knuckle assembly on my car. The lateral links are just my stock L pieces.

The rear axles are 10mm longer on either side between the sedan and the wagon. The passenger-side rear axle on the sedan is actually the same length as the drivers-side rear axle on the wagon. The non-LSD axles are 5mm longer than the corresponding LSD axles on the same chassis.

The FSM does not indicate that the front axle lengths are any different between the sedan, wagon, turbo or non, though; whereas the rear axles have different axle lengths explicity stated. The older FSMs do not indicate axle lengths at all, however it is common belief that any WRX wagon axle would go onto the GC/GM/GF chassis. I think the compatability would be determined by where the bearing position on the axle is located. If the extra length is found in the axle shaft, then the bearing would be pushed out further and it would be a no go. However, if the spline length is what is different (would that really make sense?) then it might go across.

It would not make sense to alter the front hub assembly so I think it is shared between all Subaru models (I've heard no different). The turbo crossmember is the same between the two models, so all that is left is the control arms themselves. I think the reports that the GD control arms on a GC/GM/GF give extreme negative camber far outweigh those that say they fit ok.

For my swap, I almost acquired WRX wagon rear axles, however that deal fell through. Consequently, I'll have 2001 RS axles so I can't break any new ground as far as verifying compatability.

Also, I haven't been able to come across two WRX wagon front control arms at a decent price so I won't be able to verify their fitment as of yet. It seems that people like to wreck the driver's side control arm when they destroy their WRX wagons.

-Jon
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Old 07-31-2003, 04:26 PM   #5
AJS
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Thanks for the info!

I have the larger STI rear hubs and backing plates since I'm running the 2-Pot rears. I also have the proper rear axles and an R180.

The cars being converted from a 1994 Impreza L FWD so I'm trying to figure out what rear suspension bits I can use.

I was hoping the WRX lateral links would work but it sounds like they won't. I assume any GC8 AWD lateral link will work?

Thanks

Andrew
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Old 07-31-2003, 04:30 PM   #6
stimpy
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Any GG/GC/GM/GF lateral link will work.

-Jon
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Old 08-02-2003, 07:01 AM   #7
tbd
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thanks jon,
i take it your seeking wagon arms to match the new crossmember 's wider bushing? i only ask because some have mentioned shimming the front arm bushing when using the new crossmsmber.
tony

hey andrew,
great to hear about that rally car again. just wondering if the larger sti hub is necessary for the 2-pot rears? i was under the impression that backing plates were all that were needed to mount onto a standard r160 rear diff/axle/hub combination. i ask because my 2-pots and backing plates collect dust as i cannot press out the bearing myself.

p.s. if the lateral links only differ in length, then aftermarket adjustable control arms may fit both. of course the bushings could have changed and the sway-bar brackets would be off if adjusted beyond range.

Last edited by tbd; 08-02-2003 at 07:11 AM.
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Old 08-02-2003, 10:53 AM   #8
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tbd, that is correct about the wrx wagon control arms. I may have some sourced, but I need to see if it can be budgeted in right now.

-Jon
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Old 08-04-2003, 05:23 PM   #9
AJS
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tbd

Yeah, the car is coming along, just a lot slower than I figured. We're trying to do it right!

I think you're right about the 2-pots (but I'm not 100% sure!). The only reason I have the larger rear hubs is becuase I'm using an R180 rear diff and the axles are thicker.

Don't let those 2-Pots collect dust! You need to be using those....

Andrew
Universalrally.com
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Old 08-04-2003, 11:07 PM   #10
tbd
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Default 2-pot preservaton

about the two pot rears,
i have two other pairs of rear disc/caliper setups for now, that have a lot of life, (2-pots not included) and i'm too stingy to waste these. Those rears just don't seem to wear away huh!?
tony
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Old 08-05-2003, 12:24 AM   #11
scobaru
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do the fwd trailing arm bracket that connects to the body work with an AWD trailing arm?
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Old 08-05-2003, 06:49 AM   #12
tbd
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if you have a friendly dealer that is willing to do a free parts look-up, the answer would be "yes" if the part numbers are the same. again, i wish i'd noted this before tossing out the fwd rear. sorry.

y'now, if you want to mickey mouse it, just check the clearance of that front bushing when you bolt it in. the only thing i can think of that'd hurt you if incompatible is if the trailing arm hit an obstruction.

If i recall correctly, the reason i used the ones from the donor was because its difficult to remove trailing arms only w/ power tools. you may still want to take your stock brackets off, remove arms, attatch new arms, then install. you'll have more clearance for wrenching.

tony

Last edited by tbd; 08-05-2003 at 06:54 AM.
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Old 01-12-2004, 07:24 PM   #13
PRIOR
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long time bump... im looking at doing the reear sway bar conversion on my L using wrx parts. i looked up the rear lateral link on subaruparts.com and theyre both 20250....

maybe the 5mm track width diffrence is only on the front control arms??
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Old 02-16-2004, 09:36 PM   #14
serious
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I have wrx wagon driveshafts for my swap into a 96 bd legacy. I've compared the two and they look very similar in length. I didn't measure them with a micrometer or anything, just put them both up against an even surface and they compared really close. The only difference i've noticed is an extra lip on the hub side of the shaft. It looks like it is there to keep dirt and other stuff out of the bearing area in the hub. I would take a picture, but i don't have the luxary right now. Splines are the same on both ends and i think the lip won't interfere.

I would like to know about the brembo two pot conversion on the regular hub? I have a set of front brembos and would like to have a matching set out back, but don't know if i really want to convert the car to the r180 stuff just to get the two pots.
Brent
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