Is the 901 flywheel the same as the 14 flywheel?
Starter the same? spinning the same way?

Rich

no flywheel is six hole but starter for all early is the same as 914 and spins the same way

cool,
I have the flywheel, and tons of starters (for some reason)

How about the clutch (901 to type 4)
I dont want to get into a two year only PP and clutch setup...

Rich

914 = 5 bolt 901 = 6 bolt

Early /6 clutch is the same as the 4 cyl 2.0. the original /6 clutch was supposedly heavier sprung ... 1100 lbs? and the original /4 was about 900 lbs?

If you buy a new one, you will get the same clutch for both applications.

Oh, they were 215 mm diameter. The 911 went to 225 mm in 1970, but the '70 - '71 911 setup had the same hub as the early 215 mm.

Starters are all the same whether they are the 0.8 Kw or 1.2 Kw. SR17X, SR68X respectively.

Sweet, that means I have everything here, and a new clutch and PP are here also...

Rich

isnt the 914 tranny considered a 901 type tranny? im a bit confussed on the terminology here.

The 914 tranny is a 901 tranny with a 215 mm clutch.

The '70 - '71 911 is also a 901 tranny, but a 225 mm clutch was used and instead of depressing the clutch plate fingers for release, it had a special fork and throw-out bearing that locked into the clutch plate and the fingers were PULLED.

I believe that the tranny is is called a 911/01 or 02.

The only advantage to the 911 tranny is that it was geared for a 6 cylinder engine to keep the engine in the desired RPM range, so you could keep your pinky in the air while driving and brag at the local whine & cheese meetings (Ok, so the fuchin' clutch has more surface area).

Technically the internals are nearly identical (with the ring gears on the opposite sides) but the 901 case has much smaller webbing than the 914 style. I suppose that's because the 901 cases are aluminum while the 914 cases are magnesium.

The differential setups are a bit different with respect to the pre-load specs as well since the 914 preloads differ between FAG and SKF bearings. The 901 instructions don't differentiate between them.

Did pull-type clutches start before the 915 transaxles? I missed that.

I've also been told that the internal parts (gears) were sub contracted to different manuafactures...

essentially that the 911 gears are a slightly better metalurgy than the 914 gears

don't know if this is true or not

technically the 914 tranny is I believe a type914

and the 911 tranny is a type901

so not really the same, just very similar with lots of parts that will interchange.

but to the original question

slits is right

the 914/6 flywheel has an extra bolt hole, and thus the flywheels don't interchange
but everything else does.

914 tranny is based upon the 901...its all they had to work with at the time.
901 is the early 911 tranny..

I am using this in a 356, so I need the 901 setup.

Gotta go look at the clutch and flywheel now...more questions again....hmm

Rich

1969 901 trannies are essentially the same as the 914 tranny. Mag case, larger diff and bearings, and most of 'em had the larger 14mm threaded portion on the main shaft, I think. Chill cast trannies have a problem with a lot of torque, but they'll hold up if you're nice to 'em. The 70-71 911 tranny used a pull type clutch, but it's not the same as the one used with the 915. 911 trannies have a tendency to crack on the top above the diff bearing on the left side.

The Cap'n

...as we home in on it. Thanks Cap'n

Forgot to add ... if you get the '70 - '71 911 tranny, make sure it comes with the fork or you will have one hell of a time finding one. I got lucky and found one in 6 months of looking.