Clutch Adjustment - Can't get in gear

[Sparky73]

I am on the final stages of my rebuild and can't get my car into gear. Here is what I have going on.

1973 Porsche 911 Targa body
1976 2.7L Motor
1982 915 Transmission
Rennline shifter

All are rebuilt and back together. I am trying to get the clutch adjusted before my initial start uo. I followed the steps, giving 1.4mm space between the arm and set screw. I can't seem to get the clutch cable adjusted properly. Maybe too long ?

When I press in the clutch, I can't get the car to go into gear.

Here is a pic of my set up



Any ideas on adjustments to get the car into gear ?

[Duc Hunter]

See my thread about my challenges. You need the right pedal box, specifically the arm that the clutch cable attached too. My 75 has the 75 pedal setup, and the 78 transmission I have wont work with that. The omega spring (like yours) setups had a different arm on the clutch pedal shaft to adjust the cable. My clutch pedal goes all the way to the floor and my clutch BARELY disengages. There are pictures in this thread. This might be your issue, or might be contributing to it. I ordered new parts to change my pedal assembly over to the later style and teh parts were under $150 from Porsche.

Clutch Cable Challenges

[Sparky73]

Thanks for sharing. That is helpful to see that I have my omega spring hooked up correctly. I believe my cable is too long. I have adjusted it at the pedal side. It can't go any shorter there.
At the omega spring side when you adjust the two nuts it does not seem to do anything. It's almost all the way tight and still no movement.
I am working with a 73 pedal box and an 82 transmission. I don't think that is the issue.

Do I have the Omega spring connected correctly ?

Any other thoughts of what could be going on ?

[garment]

Flip the spring on the helper arm over - you don’t want the open ends facing the ground.

[Sparky73]

thanks for the spring advise on the helper arm. That's an easy fix. That's not the problem I am having. Any thoughts to the bigger problem ?

[al lkosmal]

When installing the trans to the engine...did you verify that the clutch fork was properly mated to the throwout bearing?

regards,
al

[Ryan_Cunningham]

Originally Posted by al lkosmal

When installing the trans to the engine...did you verify that the clutch fork was properly mated to the throwout bearing?

regards,
al

That was going to be my question.

[pmax]

I would think the short arm will be rotating "freely" if not engaged to the TOB whereas the helper spring looks like it is in tension.

[proporsche]

as Al said have a look inside the trans. on the bearing and fork like this

[Flat6pac]

If the fork isn’t in location and you have closed the bell housing bolts there is a great chance that you could have expanded the fork and need to replace it. The opening on the fork is 75 mm, if crushed it opens up to 79/80 mm making it useless.
Bruce

[trials935]

Doesn't the 73 pedal box have the wrong clutch shaft for the 82 transmission as Duc Hunter found out in the other thread? You can replace your pedal box shaft or convert your sc transmission shaft to the older style that uses just the original arm and shaft, no omega spring, as I did 37 years ago on my 72. You will also have to use a 72 cable if doing this.

[Duc Hunter]

Originally Posted by trials935

Doesn't the 73 pedal box have the wrong clutch shaft for the 82 transmission as Duc Hunter found out in the other thread? You can replace your pedal box shaft or convert your sc transmission shaft to the older style that uses just the original arm and shaft, no omega spring, as I did 37 years ago on my 72. You will also have to use a 72 cable if doing this.

Nailed it. Start here. At least verify which clutch shaft you have by looking at the arm through the tunnel near the gas pedal.

[Sparky73]

guys, thanks for all the input. I just checked the clutch fork to make sure it's in place. See the picture below. It looks locked in correctly to the clutch. Take a look at the pics.

[Sparky73]

and here is a pic of my pedal box. I assume it's from a 1973 but lot's of parts were removed from this car.

[proporsche]

Jared yes you did but did not put some greese there-not the problem--what is theblack box in front of your gas pedal??it is blocking the view of the cross-shaft

Ivan

[Sparky73]

here are a few more pics. I have a drive by wire upgraded throttle pedal. It has a 3D printed pedal based for the throttle.

[proporsche]

good point anbush67....
looking at you clutch cable it seems you have to make more turns on the nut near the arm.Loose the other nut and take the play away...
Ivan
the pic you provided does not help to see what cross-shaft you have in your pedal cluster..

[Sparky73]

guys, thanks for all the input. Duc Hunter has been a big help. based on the fact that I have an 82 transmission and the cable seems to be loose, the cross-shaft on my pedal cluster seems to need to be changed. I have the rounded head shaft and need the more hex shaped end. See the pic below from Duc Hunter's post. I ordered parts last night and will swap this out. Hopefully that allows me to get tension on the cable and adjust the clutch. Stay tuned for an update next week.

I have the rounded shaft on the right. Ordered the one brass one on the left

[Sparky73]

project update. I changed out the rounded pedal shaft for the squared off version which matches an 82 transmission. The cable is now to long, I am only getting 18mm of travel on the clutch when fully pressed to the floor.
Shortened the cable on the pedal end as short as it can go
Adjusted the cable at the transmission as short as I can go.

Any ideas on how to adjust the cable ? Do I need to adjust the Omega spring and arm ? I know this issue is adjusting so everything works togethere.

Any ideas

[Sparky73]