Do i need a clutch return spring

[Lyndon302]

My 901 trans has a lug that is for a spring I'm sure. Its a 912 4 speed in my 911.
Is this a 912 thing or both. On removal there was no spring. I also can't find it anywhere .
Thanks Lyndon

[Jack Stands]

I don’t believe the 901 has a return spring on the clutch arm as it uses a push type pressure plate and a return spring on the clutch pedal assembly itself.

[Lyndon302]

Thanks
Lyndon

[Jon B]

Originally Posted by Lyndon302

My 901 trans has a lug that is for a spring I'm sure. Its a 912 4 speed in my 911.
Is this a 912 thing or both. On removal there was no spring.

A coil spring was used on all 911 and 912 transmissions, except for 911S, until 1/67 when the new .11 throwout bearing was introduced.
The return spring number is 901.116.731.01.
Refer to page R 59 in the factory 911 workshop manual, volume I.

[Lyndon302]

My 68 911 has a 67 s engine dated Sept 66 and the 4 speed is a Sept 65.
Lyndon

[Jon B]

Originally Posted by Lyndon302

My 68 911 has a 67 s engine dated Sept 66 and the 4 speed is a Sept 65.

Lyndon, in your case it depends on the throwout bearing being used. If it's the later .11 version with black plastic clips, a spring is not necessary according to Porsche.
But your 4-speed did originally have a spring, as evidenced by the pin on the bellhousing. The spring is still available new, in case you want or need one.

[Lyndon302]

Thanks. I will have look in he morning . I think my thrust was held in with a single set screw.
Lynddn

[Jon B]

Originally Posted by Lyndon302

I think my thrust was held in with a single set screw.

I don't know what that means. The need for a coil spring depends on the version of bearing used, not the fork.
If you have volume I of the factory manual, refer to page R 59, it's fully explained.

[Lyndon302]

Here its called a thrust bearing. I don't have the manual. Will confirm in the morning
Lyndon

[Jon B]

Originally Posted by Lyndon302

Here its called a thrust bearing. I don't have the manual. Will confirm in the morning

Yes, but there's no set screw for the thrust bearing. Maybe you're referring to the clutch release fork.
I'll post a scan of the manual page tomorrow, unless someone else does first.

[Lyndon302]

Yes it's on the fork sorry. The bearing is still on the fork. A scan would be great thanks
Lyndon

[Jon B]

Please post a photo of your thrust bearing too...

[Lyndon302]

Will do

[Jon B]

A quick photo of the factory workshop manual page.
See paragraph in upper right corner...

[Lyndon302]

Looks like the later one not needing a spring