No camera with me right now - I'll have to get it later today.

Until, then, you can read Grady's comments (post #17) in this thread comfirming that the '69 901/13 is magnesium:
http://forums.pelicanparts.com/showthread.php?t=261323&highlight=grady+magnesium+ trans

That's a type 911, not a 901. The 911/01 number is the type number for the transmission. 911 refers to the general type and the 01 refers to the version, which you can use to determine what gears ratios were originally fitted and what cars that particular gearbox was originally used in.

The other number is the serial number of that particular transmission, which you can use to determine the model year it was produced.

JR

W/ all due respect to Grady, the info in post #17 is wrong.

MY69 the crankcase was changed to die cast mg
MY70 the transmission to die cast mg.

Both Frere & Ludwigson & contemorary literature will back that up.

Here is a pic, from left, al. G50, mg 915, mg 911, al 901

http://forums.pelicanparts.com/uploa...1212772109.jpg


http://forums.pelicanparts.com/uploa...1212772138.jpg

This last one is from the other end
http://forums.pelicanparts.com/uploa...1212772157.jpg

Of course it would still be interesting to see yours

I'll snap a pic of the "missing link" in a few hours...

Interesting... I'd like to see those pics also.
But we have bifurcated the thread...

The poster has a Mg cased type 911. It is a similar, but beefier, design to a 901. They are so close that the gears will interchange with a 901.

BUT... the clutch arrangement is markedly different from the simple clutch actuation used on the 901. He needs to go thru the entire outer cable (sheathed) and check its position and ease of sliding. It has to make a precise "bow" or loop as it passes alongside the case.

Does anyone see anything off in the pics he posted?

I'm not one, but some are expert at getting these funky 2-years only things ironed out...

I'm not sure we ever figured that out - the person with the 911/01 and pics was "pope," the original poster "ttw18" never told us exactly what he has (unless I missed it).

'69 mag cased 901/13

http://forums.pelicanparts.com/uploa...1212788292.jpg


http://forums.pelicanparts.com/uploa...1212788324.jpg


http://forums.pelicanparts.com/uploa...1212788353.jpg


http://forums.pelicanparts.com/uploa...1212788377.jpg

Well isn't that something:confused:

once again the vagaries of the Porsche production line rise up and bite.

This has happened so many times, they must have run out of al. cases towards the end of the '69 production. The did the same thing in '77 when they switched back to al.

No general rules for the 911....

James - a friend of mine has swapped some of the gears.

I am the original poster. I have a 902/1 aluminum cased transmission.