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Old 07-21-2009, 03:23 PM   #1
teiva-boy
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Default Front A-arm bushing pros and cons?

I'm on a quest to replace all my Forester bushings with upgraded units.

I have STi lateral links with whiteline bushings(comfort plus I think)
I have trailing arms with front group-n bushings
I have a set of rear trailing arm urethane two piece jobby's.
I have whiteline urethane caster bushings (similar to an ALK bushing, but the Forester doesn't need an actual ALK, just the bushing)

Now I'm on to the front aluminum a-arms... What do I install and why?

I already have Prothane urethane units for the front a-arms.
There are group-n units I could buy, or get the whiteline units.

All three take a different approach to installation. two piece urethane, harder than stock rubber, or urethane wrapped in a metal casing.

I'm sure each has a pro and con to each. All I'm looking for is better performance, little to no squeak, and little to no maintenance.

I've thought I may tap the a-arm with a zerk fitting for the prothanes just to aid in greasing them, but at the same time, the other options may not need that at all.


Now lets here them opinions!
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Last edited by teiva-boy; 07-22-2009 at 04:41 AM.
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Old 07-21-2009, 04:15 PM   #2
teiva-boy
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Whiteline comfort plus
Urethane wrapped in a metal sleeve.
Can't be greased, but WL I dont think claims it really needs it.


Prothane kit
Urethane, two piece with a metal sleeve. I thinking of drilling the A-arm to put in a zerk fitting. The bushings are already grooved inside, so grease should flow well through the whole thing
But it's urethane, I'm afraid of it's bad reputation...


Group-n
All the benefits of rubber, no maintenance, no sqeaking, etc..
Can't think of a con, other than installation should be done at a subaru knowledgeable shop as I think most average generic "suspension places," could cut corners.
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Old 07-22-2009, 04:42 AM   #3
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Anyone? The suspension forum is my favorite (besides OT) in where the discussions are very technical and much of the noob stuff is minimal compared to the 2.x engine forums.

Dont let me down!
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Old 07-23-2009, 11:19 AM   #4
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one last try for opinions.. or I'm just going to go my original route of tapping the aluminum a-arm add in a zerk fitting, and run with the urethane bushing. Sigh, I hope it doesn't squeak badly or at all.
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Old 07-23-2009, 11:43 AM   #5
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Not a lot of people go through the effort of replacing the smaller of the two front control arm bushings. I frankly don't think there is much point, myself, unless you've got the opportunity available to do it easily. The bushing is just so damn small.

EDIT: but if you do, i think the whitelines will be the easiest to install.
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Old 07-23-2009, 01:12 PM   #6
teiva-boy
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Quote:
Originally Posted by sniper1rfa View Post
Not a lot of people go through the effort of replacing the smaller of the two front control arm bushings. I frankly don't think there is much point, myself, unless you've got the opportunity available to do it easily. The bushing is just so damn small.

EDIT: but if you do, i think the whitelines will be the easiest to install.
I think the whitelines are a one-piece with a metal sleeve around it. Thus a press is needed.

Where as my prothanes are two-piece, and no press is needed.

The whitelines also sell out about as fast as TiC can get them. Which is good for them, but bad for Joe consumer who wants them now.

Sadly, I already had them pressed out...
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Old 07-23-2009, 05:08 PM   #7
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I have the Prothane kit with the A arm bushings already installed. At first I didn't like it. Yet I got use to it. To me it feels more like a go cart now. It was tough to install. Yet I think it was worth it.
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Old 07-23-2009, 05:32 PM   #8
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i would just go with the whiteline ones.. i was going to get a set of the front inners as well but it does look like they're sold out.

for the people that want something more intense i know they make metal bushings as well.
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Old 07-24-2009, 08:51 AM   #9
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Quote:
Originally Posted by teiva-boy View Post
I think the whitelines are a one-piece with a metal sleeve around it. Thus a press is needed.

Where as my prothanes are two-piece, and no press is needed.

The whitelines also sell out about as fast as TiC can get them. Which is good for them, but bad for Joe consumer who wants them now.

Sadly, I already had them pressed out...
We have 5 sets on our way to us (the entire US supply unfortunately).

There is a definitely a huge difference with the addition of these bushings. The stock ones don't look like they'd flex much, but they do.

Tony
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Old 07-24-2009, 09:43 AM   #10
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Im still witing to install me whiteline front control arm bushing I think i will make some difference. I pressed the old bushings out of a set of sti LCAs. you can just barely flex the bushing with you hands "barely" Though this is just with my hands, not a 3000+lbs car...

Folks @ TIC Quick call Tim @ Global quick... lol
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Old 11-27-2009, 12:50 AM   #11
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Default 1998 Impreza wagon LCA Prothane install *Beware*

I installed the prothane front lower control arm bushings in today, as well as the 22mm swaybar bushings, on a 1998 Impreza wagon.

It is a PITA!!!!!

Removing the LCA's is straightforward, I could only do one corner at a time, so I did the left yesterday, and the right today. Working in my driveway, it took me about 8 hours total for the left side, and about 4 hours for the right side (many complications). I ended up stripping the right ball joint, so an unforeseen trip to Subaru was in order (good excuse to take the SV1000 out of storage..

The WORST, WORST part is removing the old bushings, and the sleeves they are mounted in. I ended up pressing the bushing out using various sockets, a vice, and copious amounts of heat. For the sleeve, I used a drill with a carbide bit, and grinded a valley into the sleeve. Once the valley was created, it took a couple taps with a flathead and a hammer. Done. Its funny, this little paragraph does absolutely no justice to the expletives that came from my mouth, and despair in my heart.

I used lots of the supplied grease in the prothane kit, and pushed the new 2 piece bushings into their place.

*BEWARE* The prothane front bushings dont fit into the stock mounts without modification to the bushing, and/or mount. I ended up cutting the bushing down an 1/8" on each side, including the sleeve. I also hammered out the mount slightly, and used losts of grease when installing the arm into the mount. The front prothane swaybar bushings dont fit either, they need to be trimmed down to fit into the 98 swaybar hangers.

Impressions: Every little crack in the road is made known to the driver, either through the steering wheel, and/or through the muted 'thwack' from the chassis. I love it! Handling feels much more precise, way less slop in the front end for sure. BTW, I am using stock springs and struts. I still have the rest of the prothane kit to go in, including the rear trailing arm bushings, and shifter bushings. Ill update as I install the rest...

Doing this crap in the driveway, in November, in Canada sucks!!
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Old 11-27-2009, 06:46 AM   #12
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tangent: does anyone know if there is a difference b/w the front bushings in the sti arms vs wrx arms?

I have a pair of sti arms and the front bushings are not like traditional rubber bushings. Are the ones in my wrx arms also the same design? anyone know? thanks.
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Old 11-28-2009, 12:08 AM   #13
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I have GC A arms and I put superpro (Prothane?) 2 piece bushings in them.

I at first tried pressing out the stock bushings with some pipe, some sockets and a piece of threaded rod. That absolutely f-ing did not work. I took the A-arms to a machine shop, had the bushings pressed out, and the new bushings went in easy-piesy.

I put on a ton of silicon grease and my front end is silent. No squeaks what so ever.

As far as NVH, my car tries to rattle your teeth loose. I'm running Whiteline original ALK, Group N top hats, etc. The A-arm bushings didn't make a noticeable increase in NVH.

Honestly, I've been told that with the GC the aluminum A-arms come with group-n rubber bushings and that the aftermarket stuff isn't much stiffer.

If you have the a-arms in your hand, its probably worth the time and money to do the work. If the A-arms are on the car, I would skip this mod and look for a bigger bang-for-your-buck mod.
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Old 11-29-2009, 12:38 AM   #14
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I have uninstalled superpro bushings too, and failed pressing the bushings out with pipe, sockets, and threaded rod. I have no idea how other ppl have gotten this to work.

I'm either going to go to a machine shop or just sell the superpros.

I have the 04-05 sti arms already , and was wondering if the stock sti bushings are better than the ones on my stock steel wrx arms. I haven't been able to find pics of the front bushings in the steel wrx arms here or online to compare.
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Old 11-29-2009, 01:27 PM   #15
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The bushings will be the same stiffness (or softness depending on how you want to look at it). The next upgrade would be group-n or whiteline plus bushings.

So far after some 5k miles, I've been running with the upgraded bushings all around.. The front super-pros were jarring at first, but I'm used to it, and can live with it.. I fI had money burning a hole in my pocket I would change it to one of the others, more than likely group-n, but I'm happy for now.
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Old 11-30-2009, 04:31 AM   #16
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Quote:
Originally Posted by teiva-boy View Post
The bushings will be the same stiffness (or softness depending on how you want to look at it). The next upgrade would be group-n or whiteline plus bushings.

So far after some 5k miles, I've been running with the upgraded bushings all around.. The front super-pros were jarring at first, but I'm used to it, and can live with it.. I fI had money burning a hole in my pocket I would change it to one of the others, more than likely group-n, but I'm happy for now.
I thought there wasn't a group n front bushing available.

I assume you also have an alk. The front super pros have the same jarring effects like the alk does? I had the sport version before which was nuts, then swapped out to the wl comfort which is still slightly jarring but much better.

anybody ever physically seen both the front sti vs wrx bushings?
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Old 11-30-2009, 11:36 AM   #17
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i would go with the GroupN. Its a pain to install, but well worth it. i put them in all the rear arms on my old car and wow, made a huge difference. and best of all, no added noise
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Old 11-30-2009, 02:49 PM   #18
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Where do you guys find all the group-n stuff? Iseem to find a few pieces here and there but is there any "one stop" shopping site? Thanks
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Old 11-30-2009, 03:18 PM   #19
teiva-boy
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subarugenuineparts.com, RCE, many subaru dealers locally, and more.. perhaps you are not looking hard enough, many vendors on this board have them or similar items.
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Old 11-30-2009, 04:43 PM   #20
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I use nick @ exeter subaru...he has all the grpN stuff in stock.
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Old 11-30-2009, 05:48 PM   #21
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I'm on the same quest with my Fozzie. I have all of the KatyBoy bushings, Group N motor/trans, trailing front/rear hub, and front top hats, and the tic shifter bushings. I tried my hand at replacing the bushings in my Aluminum lateral links but failed.

I just bought a set of '04 STi control arms and have the Super Pro front 2-piece bushings and the Whiteline KCA375 is on the way (which are on sale for $80 shipped from Subbydude).
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