Rear trailing arm?

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Rear trailing arm?

Postby legacydan » Fri May 28, 2010 8:56 am

so which of these arms highlighted is the trailing arm guys? and if i replaced the aluminium arm with steel arm would this have any negative affect on the handling of the car?

Image
Last edited by legacydan on Tue Jun 01, 2010 5:00 am, edited 1 time in total.
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Re: Rear trailing arm?

Postby teK-- » Fri May 28, 2010 10:24 am

The suspension is a multi-link design which increases toe-in and negative camber upon compression. You've circled the upper and lower links; there isn't a trailing arm per se.

If you change lightweight alloy with heavier steel you are basically increasing the unsprung weight in that area which will affect the response time of the suspension articulation.
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Re: Rear trailing arm?

Postby sheppo9 » Fri May 28, 2010 7:41 pm

teK-- wrote:there isn't a trailing arm per se.


Yes there is.
It runs north-south on the car as opposed to the lateral links which run east-west.

http://opposedforces.com/parts/legacy/e ... tration_2/ - Numbers 22 and 23 in that pic.
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Re: Rear trailing arm?

Postby teK-- » Fri May 28, 2010 9:15 pm

Ah right you are Sheppo, I never noticed that part there!
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Re: Rear trailing arm?

Postby legacydan » Sat May 29, 2010 7:09 am

thanks for info guys, ill get a new one ordered up asap
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Re: Rear trailing arm?

Postby sheppo9 » Mon May 31, 2010 10:56 pm

legacydan wrote:thanks for info guys, ill get a new one ordered up asap


A new trailing arm?
Or the lateral links like you outlined in that massively huge picture?
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Re: Rear trailing arm?

Postby legacydan » Tue Jun 01, 2010 5:00 am

sorry, ill re-size the picture, didnt realize the forum doesn't have the auto re-sizing function for pictures! all pictures look massive on my tiny netbook anyway!

So its a new trailing arm i need as thats the one that got bent in the crash according to my mechanic.
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Re: Rear trailing arm?

Postby jp928 » Mon Jun 07, 2010 4:26 pm

The bits you have highlighted are the upper and lower arms. The only front to back part looks like the roll bar (round part crossing over the green marked lower arm),so it looks like that does the fore and aft location of the wheel end .
If you have dinged one of the arms, I would guess its the lower arm (closest to the road). Pretty difficult to damage the upper due to its location, unless something large got sucked up high into the works. Show somebody the damage (on a hoist?), and order whatever it is .
Has the handling changed since the incident?
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Re: Rear trailing arm?

Postby legacydan » Tue Jun 08, 2010 1:21 am

jp928 wrote:The bits you have highlighted are the upper and lower arms. The only front to back part looks like the roll bar (round part crossing over the green marked lower arm),so it looks like that does the fore and aft location of the wheel end .
If you have dinged one of the arms, I would guess its the lower arm (closest to the road). Pretty difficult to damage the upper due to its location, unless something large got sucked up high into the works. Show somebody the damage (on a hoist?), and order whatever it is .
Has the handling changed since the incident?
jp 08 gtb 6 mt wagon.


the garage i left it into said the rear trailing arm is bent and they could not get the car to align properly because of this. They ordered the part for me already, but will be coming from Japan, so it will take a couple of weeks. Handling seems to be the same although i have been taking it easy until the rear hub and the trailing arm get replaced, got new wheel ordered up too coming from US should have that this week, and bumper getting resprayed too so, its all working out nicely 8)
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Re: Rear trailing arm?

Postby jp928 » Tue Jun 08, 2010 10:56 am

If your picture is from BEHIND the rear hub , then a trailing arm will be in FRONT of the hub, and not visible in the pic. Not familiar enough with the rear end linkages to visualize it right now. The upper link (red) looks like a forging, the visible lower one (green) looks like shaped steel plate , but dont know what the other lower link is (probably also steel plate), or the trailing link. I must have missed the part where you tell how this happened....Sometimes you can bend things and behaviour doesnt obviously change, until you notice some odd tire wear.
Good luck with it.
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Re: Rear trailing arm?

Postby smythie » Tue Jun 08, 2010 11:21 am

yeah, that's taken from behind - see the anti roll bar? It runs back from the hub to is body mounting points.
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Re: Rear trailing arm?

Postby tangcla » Tue Jun 08, 2010 2:10 pm

smythie wrote:yeah, that's taken from behind

Just the way she likes it. :wink:
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