[unknown4u]

Has anybody ever replaced the bushings in the rear axle guiding arm?

I think mine are worn out. Those rubber parts are not that good any more after 16 years.



And are those the same for all types or is this one different because I have a M030 option??



See also the picture what I exact mean to describe.



Thanks.

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[xrad]

Takes some work to do this. I have seen it done, never did it myself, though. real nice p-bronze kit from several sources...RSBarn to name one.

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[PorscheDude]

The bushings are the same for both models. The only difference with the MO30 is the torsion bars.



Give Pete a call He can get the parts you will need.



Here is an over view of the MO30 parts on a 968

http://www.weissach.net/968_M030-Option.html



http://www.968forums.com/index.php?showtop...mo30+parts+list

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[unknown4u]

Because I'm a streetdriver I do not prefer bronze bushings but "plastic" this because the rumour what is given direct to the body in case of metal to metal contact!.



I hate a noisy car. That is the reason I going to replace it, and of course they are worn out.



Does somebody have experience with both ? the "plastic" and bronze ones?

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[PorscheDude]

I think you can get them in delrin, or you could try calling the dealer for stock replacements.

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[flash]

actually the torsion bars are the same for both M030 and non-M030



the bushing are a PAIN to remove - they have to be essentially burned off



what makes you think yours are shot? i'm not saying they aren't, just wondering what led you to that conclusion



there are delrin replacements and polybronze ones - rs barn carries both - i have tried both



the delrin were certainly more cost effective, but made noise - they are not plug and play - you will have to do some sanding and fitting because the end caps are cast aluminum, designed to fit against a rubber bushing, therefore not requiring high tolerances, and vary in size enough to require fitting



the polybronze were a lot more expensive, but worked better - they are a bronze bushings set in a polyurethane bushing, complete with grease fittings



both made for improved rear suspension feel

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[unknown4u]

FLASH: What make you think they are shot?



First of all, If I drive on a stone road there is something hammering against the bottom at the right rear side. Ithought first it was the exhaust but it wasn't.



Second. After I replaced the bushing from the rear guiding arm I noticed that the arm could wigle.



Third I do have a metal to metal sound in the interior witch is not a bad differential or so. The sound is coming from the right rear side. Wheelbearings are already replaced but gives no improvement. The sound stays.



The thoughts are that the mechanical sound from the tip is transferred throught the suspension to the interior by some worn rubber bushing that causes metal to metal contact.......



The sounds appears from 40 miles an hour to 65 miles an hour. above that the sound is not heared yet because the exhaust and tires made more noise. And it fluctuates when the suspension hits a bump.

Turning left and right in fast corners makes no different.



You can describe the sound as listening with your stetoscoop direct onto a bearing.



It is a little frustrating but the car gets newer and better everytime.





The only thing I did not was replacing or regreasing the constant velocity joint on the wheelside.......

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[flash]

i don't think it is that bushing - while they have been known to get soft, they rarely actually fail - you should also notice a lot of rear end weirdness in handling if it were - the noises you would hear would be knocking sounds, not continuous sounds



you say you replaced the bushing already? is this a new bushing that you think is shot? is it a different bushing?



metal sounds can be a lot of things - your tranny mount could be shot - that would make noise transmit - a loose or shot CV could do it too



this sounds a LOT more like a bad bearing than a bushing, but, you could have both

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[unknown4u]

I'd replaced the inside bushing from the rear axle guide arm. (the aluminium)



The tranny mount could be shot but it isn't. I'd allready got it out. but nothing is wrong overthere.



I'd also replaced the CV at the tranny. But did not the one at the side of the wheel.



The CV feels good by hand but I don't know what it does under torque............or in free run?



When I set the transmission in neutral at 60 mph the sound is still there.

playing with the trottle and in 3 or 4 gear gives no fluctuation of the sound.

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[flash]

ah - if there is no on/off throttle issue, you can certainly discount loaded components like trans, trans mounts, and likely main suspension components



so the axle bearing itself is still original? that is quite possibly the problem - those are known to fail - they generally make a low growl sort of sound - have you driven around in circles, both left and right, and seen if there was a difference in the continuous sound (not the clunk)? if there is, you have found at least one of your problems

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[xrad]

have to agree with flash, a whirring sound (like stethescope on bearing) is NOT the rear arm bushing. BUT the arm should not be loose, either.



You might have TWO problems at once.



Here is what to do:



Remove the trunk carpet and padding and hit the road.



Does the sound occur AT SPEED in NEUTRAL with the CLUTCH pedal depressed to the floor?? If so, it can be the carrier bearings or pinion bearings. OR it could be the CV's, OR it could be a bad wheel bearing (even though you had this replaced (but less likely). not going to be the input shaft bearings.



Metal banging sound is more like what is heard with a worn bushing. And having a loose arm is not correct.

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[flash]

he has a tip

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[xrad]

I have a tip too, I just don't go around braggin about it...



Oh, you mean Tiptronic....ooops..missed that.... <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />

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[unknown4u]

Turning to the left and right does not efflect on the sound.

The bearing is replaced a while ago. 1000 miles. After replacing I still have the same sound. First of all I thought that is was that what I and others heard.

Because I have already replaced all major parts there's one left...........



The outher cv.



So I'd ordered it for 95 $ so I wait for delivery and will replace it.

I'm not going to clean it or regrease it anyway. I just do it good.



After replacing the cv, the car is brand new at the right rear side <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" />

Only the bushings will be left in old condition.



I'll keep you informed.

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