911/01 Transmission?

tijnes · 05:59 AM

I'm almost ready to install the drivetrain in my '66. The transmission I have for it is a 911/01 #7701246. I bought it attached to a 68 alu case engine and it ran well at the time. I've taken the transmission off the engine for inspection and found something strange. There's a notch at the opening for the clutch fork is (see pics)? It doesn't look like wear and it doesn't look like a factory job either. Has anyone seen this before?

tijnes · 04-09-2008, 12:14 PM

Anyone?

I cleaned up the engine a little and it's ready to go I just would like to know if the trans like that will cause problems.

Thanks
Martijn

Matt Monson · 04-09-2008, 01:13 PM

Have you looked into and addressed the issues related to output flanges, CV axles and clutches and clutch release with respect to putting a LWB transmisssion into a SWB car?

Jandrews · 04-09-2008, 01:36 PM

I am running that same transmission with my 2.7 RS Spec motor. I LOVE that transmission. It has the 901 shift pattern, i.e. first gear down and to the left, leaving 2nd and 3rd in line for great track shifting performance. Also has a 7:31 R&P, which makes for great acceleration from these peaky motors. I am running A, F, N, V, ZD gears, which are a bit on the tall side, but work well with my 2.7 RS motor.

All that said, I have not seen that slot cut before. I am not near mine to check it, but either way, I don't see where it would cause you any problems.

JA

304065 · 04-09-2008, 01:52 PM

Martijn,

What you have there is a 911 box out of a 70 or 71. I have one in my race car. Stock gearing is A GA O V ZA, good for about 140.

The tunnel will probably need to be modified to make it fit. The clutch release mechanism works opposite the way a 901 box works, the cable end is fixed and the HOUSING moves to actuate the clutch. No, I am not making that up. Also, the CV joint flanges are a different size, they are bigger than the early 901.

You should really consider sourcing a correct 901 AFMSX box for your car, it will be a lot easier. I am looking for a spare 911 box, let me know if you want to sell the 911 box.

Matt Monson · 04-09-2008, 02:49 PM

Martijn,
Drop me a line if you decide you are looking for an aluminum 901 with AFMSX. I have several cores to build on.

tijnes · 04-09-2008, 03:01 PM

Thanks all for the replies. My car is a true bastard. It is converted to LWB started by PO. The trail-arms are from a 69S so the axles should fit. The 68 motor above already had the 225 clutch and ran well when I bought it. It was in a 73 that got totaled. Front suspension is from a '78 and so on. A bunch of parts that I'm trying to turn into a running car.

I've read up on the 911/01 box and ordered the 911 specific cable setup including the metal "articulated piece" etc. I'm convinced I can make this work. So far I haven't figured about the slot in the housing but if it isn't going to be a problem that's good.

The other thing is the lever at the pedal cluster. I haven't been able to find the size of the lever that is correct so if anyone can help with that I would appreciate it.

Martijn

Grady Clay · 04-09-2008, 03:21 PM

Martjin,

You probably have some of the best-in-the-world people offering you advice.

You have a ‘late’ ’71 Type 911 transmission (rectangular boss under the differential). You can convert this (with some difficulty) to fit your ’66 911. I have one in my SWB ’68 911. The advantage is the large Type 911 (same as 930) ZF LSD, the lightweight magnesium castings and a few more details. The difficulty is fitting the pull-type vs. the push-type clutch and the different axles (due to wheelbase). Difficult but not impossible to overcome.

For your ’66, you are far better off with an aluminum 901 transmission as the axles & flanges and clutch linkage will fit your car. The gears are the same; 901, 904, 906, 911, 914 & other. Among those there are many subtle details that may help fit your situation. Of course the next transitions are 915, 930, 950, 964 and more.

Best,
Grady

Matt Monson · 04-09-2008, 06:22 PM

It sounds as if you have the conversion to the mag case tranny pretty much all sorted out. I don't have any help to offer on the pedal issue.

I did have a chance to look at a couple of different 911 type mag cases I have in the shop and none of them have that cutout that you are showing. I imagine that someone just did that for their own personal reasons. If I were to speculate, it would be that it let them move the throwout arm a litte bit to be better access to the nut that holds the tranny to the engine. I may have allowed quicker engine removal while leaving the tranny in the car. But that's just a guess...