GV Shark 4WD 1/10 - Powerfull motor installed but power lost in transmition system

[Antreas]

I have installed a very powerfull brushless motor and ESC at the GV Shark but from standby position on road if give a lot of throttle the motor sounds like spinning very much but the car still moves slowly (Walk) and afterwards slightly begins to correspond accordingly.

Tip that may completes the issue: If I remove the axis from the 4WD system and so only the rear wheels will be attached to motor, the issue of stacking is much worst.

I need better transmition to solve this?

[Antreas]

On an electric radio controlled car or gas powered a "Slipper clutch" exist. This is two disks at sides of a gear. Sometimes on the main gear, mine was at one other gear in the transmission. So a nut is on that and if you turn it right you have less clutch involved at drivetrain (The whole transmission), if you turn it left you have more clutch involved that means if you turn it totally left the car will not move when use throttle because the slipper clutch is much opened and make no affection on the drivetrain.

Antreas.