g96/g97 transaxle in a aircooled

[pep fab]

anybody here have done the conversion?

[Matt Monson]

The crankcase bolt pattern is different. To my knowledge nobody has made an adapter plate to suit. The challenge is that the starter is on the engine on the m96, whereas it’s on the gearbox on anything air cooled.

[pep fab]

the pattern is different except for turbo engine, metzger share aircooled pattern.

[Matt Monson]

Originally Posted by pep fab

the pattern is different except for turbo engine, metzger share aircooled pattern.

The GT3 gearboxes all bolt right up, and are 2 wheel drive. Turbos are awd. Plenty of people have done that conversion on race cars.

[TeeJayHoward]

Looked into this briefly for my '81. Things that come to mind:
1) Bolt pattern only correct on the expensive models
2) Transaxle mounting points wrong
3) Torsion tube interference
4) Hump between rear seats too small
5) Cable vs hydraulic clutch
6) Sensors

[Matt Monson]

Correct. Budget $25-40k to do it. That’s why I thought maybe he was asking about the g96.00/01 Carrera gearboxes, which is a $2500 gearbox.

[dannobee]

Don't forget too that the shifters are entirely different. Cables on the G96, rod on the earlier cars. And the pedal box and associated parts if you're going from cable clutch to hydraulic.

I have a 996 GT2 in the garage sitting next to the G-body. I've eyed this conversion for years. If you have mad metalworking/fabrication skills, much of it wouldn't be too difficult, but the cost of the gearbox itself and all of the conversion parts really adds up quickly. The G96 trans is a LOT longer than a 915 when you set them side by side.

By G96, I assume the OP meant G96/50, /88, or /90. The G96/01 has a different bolt pattern and won't bolt on, along with the starter mounted on the engine instead of the transmission. They simply won't fit.

[wjdunham]

Originally Posted by Matt Monson

Correct. Budget $25-40k to do it. That’s why I thought maybe he was asking about the g96.00/01 Carrera gearboxes, which is a $2500 gearbox.

Matt, are you still working on the sequential 915 conversion (I thought I had read that somewhere)? If so, my guess would be the cost would be in this same ballpark for a plug and play solution?

Bill

[Bill Verburg]

Originally Posted by pep fab

anybody here have done the conversion?

It would be hard enough to fit a g50/01 into a pre '87 911

but w/ enough $ and skill anything is possible

[Matt Monson]

Originally Posted by wjdunham

Matt, are you still working on the sequential 915 conversion (I thought I had read that somewhere)? If so, my guess would be the cost would be in this same ballpark for a plug and play solution?

Bill

Covid has temporarily put the project on the back burner. Until we see some normalcy to steel availability and inventory levels, it will simmer for a bit.

There is a Holinger sequential solution for these cars. Jerry Woods installed one for a customer, and did it with hand controls. I don’t know what it cost, but $40-50k would be my guess.

[winders]

Originally Posted by Matt Monson

Covid has temporarily put the project on the back burner. Until we see some normalcy to steel availability and inventory levels, it will simmer for a bit.

Are you using the whole 915 case or are you using just the bell housing and using custom gear housing and cover?

[djb25]

Originally Posted by Matt Monson

Correct. Budget $25-40k to do it. That’s why I thought maybe he was asking about the g96.00/01 Carrera gearboxes, which is a $2500 gearbox.

How are the g96.00/01 gearboxes?

Would it be a worthwhile upgrade for a pre-g50 car, purely from a gearbox perspective (ignoring the difficulty of the conversion)?

[winders]

Originally Posted by djb25

How are the g96.00/01 gearboxes?

Would it be a worthwhile upgrade for a pre-g50 car, purely from a gearbox perspective (ignoring the difficulty of the conversion)?

Those gearboxes don’t fit on Mezger (air-cooled) engines.

[kevingross]

Originally Posted by djb25

How are the g96.00/01 gearboxes?

Would it be a worthwhile upgrade for a pre-g50 car, purely from a gearbox perspective (ignoring the difficulty of the conversion)?

Weighs more, wrong gearing, bloody difficult to service, unknown costs to adapt the G96 to your car... sounds like a great idea!

[stownsen914]

Are aftermarket gear ratios available that fix a g96 box?

[dannobee]

G96/01 simply won't fit. Don't know how many times we need to say this.

The 3.4L has an entirely different bellhousing, with the starter mounted to the engine.



The Mezger engines have a round bellhousing with the starter mounted to the transmission.

[stownsen914]

Using that logic, you can't put a Hewland on a Porsche engine either. I guess it would take a LOT of work. Saw a Cup Car sequential box on a 914 recently.

Do g96 boxes share gearsets with any other Porsche trannies like G50?

[pep fab]

im will be using a 997 turbo tranny i am curious what are people doing for hydraulic clutch pedal

[winders]

Originally Posted by pep fab

im will be using a 997 turbo tranny i am curious what are people doing for hydraulic clutch pedal

If you are going through the effort to put that gearbox in an air-cooled car, you might as well get rid of the pathetic Factory pedal cluster and get a Tilton 800 series cluster with hydraulic clutch setup.

[winders]

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