Truck dont acelarate properly

[ObservadorPt]

Hi

I have a thrustmaster t300rs gt edition wheel and now i have a th8a shifter without the shifter the game works fine but with the shifter the trucks doesnt acelarate and starts like powering off and on constantly and eventualy starts to move, but if i stop the problem starts again, happen in eurotruck 2 and american truck i made a video with the problem, i hope you can help me please.

Watch on YouTube

EDIT: Problem solved.

[Tefty]

Did you get an answer to this, I have just brought this exact setup and have the same problem.
Within the main menu the shifter setup and and rebinds pickup fine but as soon as your in-game it just goes berserk and doesn't work properly and I have to use paddles on my wheel or go automatic