Gear ratio 1st gear not working ?

[microdino racing]

Hi,

i'm trying to adapt the original gearbox from a Trabant 601 to the game. But the first and the second gear seems to be the same? I'm a bit confused...

Here the gear ratios:

(1.) 4,08 (12,48)
(2.) 2,32 (19,44)
(3.) 1,52 (25,38)
(4.) 1,10 (29,32)

(Final) 3,95 (19,75)

Is there a limitation for maximum?

If somebody doesn't know the Trabant, here is a little ingame-video of me (power adjusted, paintshop done):