Porsche G50

[Alcarp]

What is the difference between all the transaxel numbers G5-00, 01,02,03,04 05,20,21, what the, and there is a long tail, a short tail. which ones are compatible?

[flotowngtm]

You can find a lot of that info on Californiamotorsports.net or Gboxweb.com

There you can find all the different ratios and some info on each unit.

[Daniel Dinverno]

look in the GTM faq section starting with threads from the beginning and you will find G50 transaxle comparison info

Transaxle FAQ

[Rumbles]

Here is a spreadsheet I compiled on Porsche specs. Most of the data is from Gbox.com. I was very handy to me when I was trying to select a gearbox.

[Daniel Dinverno]

sent PM

[Erik@GBox]

Generally any of the 90+ G50 units will work well in the GTM. The G50/01 and G50/02 which were in 1987-1989 cars are not ideal, as I believe that FF5 has stopped producing flywheels for this model, and only provides for 90 forward.

I would be happy to discuss your options in more detail though if you would like to give me a call sometime.

Happy to help,

Erik Johnson
GBox LLC
(303) 440-8899 work

[800awhp]

Hi Erik. Quick question that Im sure you will know the answer too. Installing a G50-21 compared to the more "common" G50-20 should not have any difference in quality of the gearbox. Only change in slightly longer gears right?

[Erik@GBox]

Originally Posted by 800awhp

Hi Erik. Quick question that Im sure you will know the answer too. Installing a G50-21 compared to the more "common" G50-20 should not have any difference in quality of the gearbox. Only change in slightly longer gears right?

Yep you are correct, the G50.21 is simply longer geared. No other differences.

Erik