Algodoo

Hello everyone! I started doing Audi A1, and encountered a strange problem. When the car reaches speed of 30 m/s, wheels go crazy! There is no chance for it to go over 30 m/s. Homever, I want to make it reach 60 m/s. Not more. Can anyone help me fix this? Also, I would be grateful if you could tweak a suspension a bit and/or add spring engine. But, first, I have to get rid of "dancing" wheels thing. Put the scene in responses. Thanks a bunch guys! Password is 123456. Thanks again!