Helping finding 1989 Clubsport gear ratio

[Blackbyrd]

I have clubsport service book and it didn’t list the ratios


I have the euro parts catalog and see only 5th gear ratio changing
Does anyone know a definitive clubsport G50 gearbox ratio ?

Thank you in advance

[Bill Verburg]

Originally Posted by Blackbyrd

I have clubsport service book and it didn’t list the ratios


I have the euro parts catalog and see only 5th gear ratio changing
Does anyone know a definitive clubsport G50 gearbox ratio ?

Thank you in advance

3 g50 versions
g50.00 RoW
g50/01 US ,Can.& Aus
g50.03 Switz.

each had M220 LSD option

I see that 5th was changed for '88 up from 31:36 to 33:36 for '88m up RoW
and from 32:36 to33:37 on the others

no reference at all to M637 changes to the trans, just to engine suspension and chassis(mostly interior parts

[Matt Monson]

Clubsports have no special ratios.

[Blackbyrd]

Thank you both
Great contributors

I did hours of searching and came up with the same
Conclusion

Everywhere I read and see (videos) everyone says “close gear ratios for clubsport”
Including UK magazines where they already had shorter gears on normal Carreras
But no one says what those gears are

The parts catalog only changes 5th and they get taller and taller

I see ROW is short compared to USA and the 5th going up in teeth must have been for economy

I went as far back on the forum and didn’t see any other reference for M637/Clubsport

Maybe the USA didn’t have special gearboxes but how about the Euros ?
Is there a definitive way to tell ?

[Bill Verburg]

Originally Posted by Blackbyrd

Thank you both
Great contributors

I did hours of searching and came up with the same
Conclusion

Everywhere I read and see (videos) everyone says “close gear ratios for clubsport”
Including UK magazines where they already had shorter gears on normal Carreras
But no one says what those gears are

The parts catalog only changes 5th and they get taller and taller

I see ROW is short compared to USA and the 5th going up in teeth must have been for economy

I went as far back on the forum and didn’t see any other reference for M637/Clubsport

Maybe the USA didn’t have special gearboxes but how about the Euros ?
Is there a definitive way to tell ?

No M897 anywhere wrt trans except for a short throw shifter

.00 RoW: engine turns 2.966 per 1 wheel turn turn in '87 and 2.991 in '88
.01 US, Cdn, Aus: engine turns 3.062 per 1 wheel turn in '87 and 3.072 in '88
.02 Switz.: same as US

Biggest difference seems to be US market still had full under coat
and a funky rear seat delete that added weight to US CS
US CS weight before Porsche Cars NA decided to keep full undercoat was 2601#(155# less than a US Carrera. Row w/o undercoat was 2557#

GB CS seem to have similar weight handicap to US versions