My Whirlpool dryer is tripping the breaker

So, the dryer works for a while, then trips the breaker.

I have already:

Replaced the plug;
Rewired the outlet;
Cleaned the vent to outside;
Replaced the vent hose attached to dryer;
Replaced the thermal fuse;
Replaced the motor.

Any ideas?

Corrected model # LEQ9030PQ0