Help my truck wont turn!!!

[HIsaidmycat]

Ok so when i go to pull a haeavy load, the screen pops I go to the pick up site and I go pick up the load when I pull out my truck wont turn i will try to tun my truck left or right and it just goes straight and this only hapens with heavy loads not lighter loads it happens with with modded trucks and vinila trucks help anyone?????

[Igzy20]

Use stronger 6x4 or 8x4 truck. 4x2 trucks are too weak for heavy load.