Noise after Upper Rear Track Arm Replacement

[Anim]

Sounds like the same problem on mine??

I was told by Zentrum that it is the "Lower Control Arm Bushes" that are the cause, they crack or corrode and will rattle like mad, especially if you drive over cobbles. It should not cause any handling issues though.

I was also told that you can't physically see the problem on the bushes and it only manifests when assembled and the car is moving.

http://www.hartech.org/parts.html do a £90 replacement part which I will try someday otherwise its a £200 part if going original.

Was told to get both rear sides done as they often go together.

[RandallNeighbour]

Dragonflyoh, those lower, longest track arms do go out and cause the noises you are speaking of. Might be the newer, tighter adjustable uppers are giving the lowers the room they need to rattle now. It's always a slippery slope.

Vertex sells them with polyurethene bushings that should not wear out as fast as factory ones:

http://www.****************************************.com/ShowItem/128301%20Porsche%20Rebuilt%20Control%20Arm%20-%20Rear%20Track%20Arm.aspx

[dragonflyoh]

The part I replaced is index number 8 in the attached drawing. I was thinking I might hear from someone that actually replaced their arms with the adjustable arms and hear what sort of experience they had. I am thinking RandallNeighbour may be on to something with the slippery slope. RandallNeighbour are you saying that index 17 may be causing the noise?

[ppbon]

... worn drop links.
If you can manually twist the droplinks with the car on its wheels, they're probably toast.
Good droplinks should be very difficult to move by hand because the joints are tight. After the joints wear they can generate a loud rattle when going over bricks, pavers, etc.

Happy Boxstering,
Pedro

[RandallNeighbour]

Dragonfly, ignore what I wrote above. I didn't realize you bought an adjustable trailing arm (#8)... I though you'd replaced #17 with an adjustable unit (that's what I did).

Sorry about that.

Do test your drop links according to Pedro's advice. That's a good word from him.

[dragonflyoh]

Thanks for the help.
I was able to move the drop links, with WOW, and using gloves. Not a lot of motion but enough that I will replace them. I found them on E-bay,(Deutsche has a pair of drop links for $67), Pelican, and requested pricing from Sunset. I shall replace the torsion bar bushings at the same time.
I shall post the results.

[RandallNeighbour]

Dragonfly, read this carefully:

RUN AWAY FROM DEUTSCHE PARTS ON EBAY.

Their stuff, especially their drop links, are total crap. I know this from repeated personal experience. Learn from my failures.

Buy factory parts unless you have $$$ to spend per corner for Tarrett Engineering fully adjustable ones.

Check with Sunset Imports in Oregon. They sell at 10% over their hard cost plus shipping. Sometime they are a LOT cheaper than anyone else.