Type designation
| Type designation | 
FM55 501 A12345
The three groups of characters are separated by spaces and contain various pieces of information about the gearbox as specified below.
| The first group: | 
Pos. 1 - Drive F = Front-wheel drive
Pos. 2 - Type of gearbox
A = Automatic transmission
C = ACS and manual gearbox
M = Manual gearbox
Pos. 3 - Number of forward speeds
Pos. 4 - Overall ratio in top gear (code, see table)
| The second group: | 
Pos. 5 - Engine/Car adaptation
5 = Manual gearbox adapted to engines B206I, B234I and B204L
6 = Manual gearbox adapted to engine B258I
7 = Automatic transmission adapted to B206I engine 8 = Automatic transmission adapted to B234I engine Pos. 6-7 - Development variant
| The third group: | 
Pos. 8-13 - Serial number.
Manual gearboxes have a six character designation which starts with a letter which shows the line on which the gearbox was fitted. Each number series consists of a five digit number.
| Code | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 
| Gear ratio | 3.2 | 3.1 | 3.0 | 2.9 | 2.8 | 2.7 | 2.6 | 2.5 | 2.4 | 2.3 | 

 
     
		