My son and I recently bougght a Savage 25. It was running fine at the track until we suddenly had a plenty of engine power but no drivetrain power. The truck will still move forward slowly with high revs and it will eventually gain some speed but there is no low end quick acceleration. We took apart the cluthc and everyhting looked fine. Anyone have a similar problem or have suggestions before we start to disassemble the transmission and drivetrain?