I applied for engine repair and diagnostics of the dq200 box. There were shocks from 1 to 2 and from 2 to 3. They changed the oil, adjusted it, and the box began to drive much better. But soon they told me to get ready to replace the clutch, and they promised to do the job efficiently. According to the engine, there was a replacement of liners, grinding, chain replacement.. The work was done quickly, they gave a guarantee. The price is very adequate.