Transmissions, Porsche Transmissions Options

[Randal]

I keep hearing about all the different transmission formats that can be put into a 914 (4 or 6).

One of the guys at Sundays event is building a 914 with a 993 engine with the transmission turned upside down. Now how can that work, i.e., shift patters, etc.

So what are all these different transmission numbers (914/915/?)and what are the differences?

And why are 915 transmissions so expensive?

[Brad Roberts]

One of the guys at Sundays event is building a 914 with a 993 engine with the transmission turned upside down. Now how can that work, i.e., shift patters, etc.

Did he tell you what tranny ?? Did he tell you that the tranny will be hanging out the back of the car by 3 inches...LOL Unless he uses a early G50 upside down... NONE of the 993 boxes will even fit under our cars. Typically they would cable shift these cars.. the pattern is always in the box... you just have to twist the cables to match the upside down box.

So what are all these different transmission numbers (914/915/?)and what are the differences?

901/914/915/930/G50/G50-50/ << the ones you need to worry about. As the numbers go up.. the tranny gets bigger/stronger and more expensive. Every 911 from 1973-1987 had a 915 box in it. Everything after 87 had a G50 in it until 92 or so. The G50 was Porsches best shifting box. ALL the Porsche tranny's after the G50 (except the new 996 non-turbo) are based on the G50 platform including the 996 TT box and the GT3RS race cars.. they just added gears and made them cable shifted.

And why are 915 transmissions so expensive?

1200$ for a 915 is not expensive... we will have 7000$ in the 915 for the 9146 that I am building. This is WEVO everything from the shift knob back. New limited slip... blah blah..