300090

[haul]

no cover on early 912‘s either….
there is a nice upgrade for the hardy disk/steering coupler
from Ron
https://precisionmatters.biz/steerin...er-911-912.php

[moito]

.i knew about the fact that early cars don`t have the cover but never did my homework to determine when it was introduced... should be a rather easy task since the shape of the steering rack housing was adapted to the new feature..have about 20 early racks and they all have date codes and serial#.

[300090]

Hello members,

The 300090 has trailing arms with the following casting number:
901 331 511 02 / 901.331.511.02 / 90133151102
I have picture of only one side:



I think they are not correct for my car because they have the sway bar mount / ball.

Do you know the year / model of these trailing arms?

So, I am looking for a pair of correct trailing arms for the 300090 but I don’t know how to recognize them.

For example a friend of mine has two pairs with this casting numbers:
Pair #1: 901 331 215 12 / 901 331 216 12
Pair #2: 901 331 215 1R / 901 331 216 1R

Would one of these pair be correct for my car?
Again, do you know the year / model of these trailing arms?

Thanks for your help
Philippe

[moito]

Hello members,

The 300090 has trailing arms with the following casting number:
901 331 511 02 / 901.331.511.02 / 90133151102
I have picture of only one side:



I think they are not correct for my car because they have the sway bar mount / ball.

Do you know the year / model of these trailing arms?

So, I am looking for a pair of correct trailing arms for the 300090 but I don’t know how to recognize them.

For example a friend of mine has two pairs with this casting numbers:
Pair #1: 901 331 215 12 / 901 331 216 12
Pair #2: 901 331 215 1R / 901 331 216 1R

Would one of these pair be correct for my car?
Again, do you know the year / model of these trailing arms?

Thanks for your help
Philippe

if i remember correctly the hole pattern or size/shape of the oval hole, where the spring plate is mounted is a bit different on early cars...#96 had a damaged trailing arm that i replaced ..i still should have this arm somewhere...will look for it asap

[preS]

Franz is correct. Smaller hole for the M12 bolt and unique casting number.

Richard

[300090]

Thank you Franz and Richard.

Some additional info: the left and right trailing arms I have have the same casting number: 90133151102

I made some searches and found trailing arm with same casting number on eBay:
https://www.ebay.com/itm/154826186517
The seller indicates: "Off a 1967 Porsche 911"
Note: this trailing arms on eBay do not have the sway bar mount ball.

Here is a possible scenario in my opinion:

As you know the 300090 has 911 S 1967 rear brake calipers:
See this post:
https://www.early911sregistry.org/fo...=1#post1153577

I think a previous owner replaced the original rear axle on my car with a 1967 S rear axle : trailing arms + the brake calipers.

What do you think about this assumption?

Anyway I need the correct trailing arms for my car.

Thanks,
Philippe

Following are some pictures of the trailing arms I have on the 300090:

[preS]

Since the correct arms are probably hen’s teeth, remove the sway bar pin.



You need the earlier covers. See thread re. prototype 912 greame


Richard

[edmayo]

If you don't already know, nylock nuts were not used. Looks like the sway bar pins were welded in later in life, doesn't look factory done.

[John Straub]

If you don't already know, nylock nuts were not used. Looks like the sway bar pins were welded in later in life, doesn't look factory done.

+1 on the pins.

John

[moito]

if i remember correctly the hole pattern or size/shape of the oval hole, where the spring plate is mounted is a bit different on early cars...#96 had a damaged trailing arm that i replaced ..i still should have this arm somewhere...will look for it asap

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