Six vs four, Trans question Options

[mepstein]

Please remind me how to tell the difference between a four and six transmission case. Thanks!

[ClayPerrine]

That "Feature" on the trans bell housing on the sixes, and the loop on the side cover, are there because Porsche was using the same case on the 70 and 71 911, with the 225mm pull type clutch. That is the anchor for the end of the 911 clutch cable and the loop is the cable guide.

The ones on the fours were a Porsche design from 69, that was built by VW. And they have the markings to prove it. If you look in the bell housing on a 914-6 transmission, the pad that the ball stud is in is oval shaped. The clutch arm pivot on the 70-71 911 was mounted in a slightly different place.

You can combine a 70-71 911 trans with the pull type 225mm clutch with 914 side shifter parts and make a transmission that will work on anything up to a 3.2 engine using factory parts. The drawback is you have to use the 70-71 911 pressure plate and release bearing. And the release bearing is well over $300.00 for a new one.

But you do get a 914 that doesn't need a pulley on the side of the transmission. So the clutch tube in the chassis has no stress on it and is just a guide tube.

Yes, I know this works. I have one that I took out of my car still attached to a 73 2.4 MFI motor sitting on a dolly in my garage. I used a 76 911 clutch cable to hook it up.