Installing a 915 on a 69’ 912

lrodri64 · 01-11-2020, 04:48 PM

Hi,

Any tip / advice on how to install a 915 on a 1969my 912 ?

Thanks in advance.

lrodri64 · 01-11-2020, 04:49 PM

I need to know which pressure plate I have to use.

john walker's workshop · 01-11-2020, 05:03 PM

You have a push clutch, so the only 915 that will relate to that is a 76 912e one. May still have some t/o bearing interface issues, never tried it.

bkreigsr · 01-13-2020, 11:21 AM

Quote:

Originally Posted by john walker's workshop

You have a push clutch, so the only 915 that will relate to that is a 76 912e one. May still have some t/o bearing interface issues, never tried it.

And even with that, the 923 trans from the 912E will not work with 915 running gear. You need a VW input shaft and clutch/flywheel package for 215 mm components.

Bill K

john walker's workshop · 01-13-2020, 02:18 PM

The 912e trans has a vw size mainshaft.

lrodri64 · 01-14-2020, 08:23 AM

Hi again.
I explained to my customer all the pro’s and con’s for doing that and now we are back in the market for a 1969 5speed 901.
Thanks.

jpnovak · 01-14-2020, 08:49 AM

There is a rebuilt 901/13 in the classifieds right now. Correct with 6:29 CWP.

Worth a look.

flyingjay · flyingjay's Garage

I believe I have a 69 912 transmission. I can check when I get back to the shop

Matt Monson · 01-15-2020, 04:13 AM

Quote:

Originally Posted by jpnovak

There is a rebuilt 901/13 in the classifieds right now. Correct with 6:29 CWP.

Worth a look.

I’m going to assume the reason his client thinks he wants a 915 is they are adding power and need strength. The 6:29 (stock for a 69 912, but not stock for the 901/13) is weaker than the standard 7:31. Porsche used them for hill climbing and rally back in period and would toss them after one race weekend. I would be looking for just a plain stock 901/13 and then strengthen it with a new bearing plate and side cover.