My car is Nanjun 4 100 dump truck. The car can't be lifted when it runs to 60 speed, and the sound of the engine is a little different. I feel the car is weak.

First, it's normal that the speed of the dump truck can't get up, but the speed of your car should be 70-80, and 60 is a little low;

Second, several reasons why 60: 1 can't run, the speed ratio of the rear axle, that is, low-speed teeth (strong climbing); 2. The lack of engine cylinder and insufficient output torque are the manifestations of insufficient power;

Third, I suggest you go to Nan Jun service station to check;