The G50 gearbox was carried over from the 3.2 Carrera of 1988/9 and consists of an integral transaxle unit where both gearbox and final drive reside in the same casing. Depending on application there are a range of gear ratios used giving rise to five variations of the gearbox as shown below:

 
G50/03
G50/04
G50/05
G50/10
G50/52
Model
Carrera 2
C2 Switzerland
C2/RSA (US)
RS/RS3.8
All Turbos
1st gear
3.500
3.154
3.500
3.154
3.15
2nd gear
2.059
1.895
2.059
1.895
1.79
3rd gear
1.407
1.333
1.407
1.407
1.27
4th gear
1.086
1.029
1.086
1.086
0.97
5th gear
0.868
0.868
0.868
0.868
0.76
Reverse
2.857
2.857
2.857
2.857
2.86
Final drive
3.444
3.444
3.444
3.444
3.44

Some transaxles also had Limited Slip Differentials (LSD) fitted - standard with all Turbos and Carrera RS. A choice of locking ratios was offered, providing either a fixed 40% or a variable 20% - 100% locking.

The oil used in the gearbox/final drive is SAE75W/90 Gear Oil - 3.7 litres in the case of the non-Turbo cars, 3.8 litres for Turbos. A valuable note for the DIY'er is to make sure you can release the level plug BEFORE you drain the oil from the transaxle. If the level plug is seized, once the transaxle is drained you will not be able to refill it.

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