I see some good reviews about these guys, and this is why i went with them, but my experience has been terrible! I had sent a valve body in to be modified and these guys put a spacer in one of the valves to increase line pressure. The spacer was so big it stopped the valve from opening fully, causing my transmission to get low line pressure. - When I contacted Pat the owner, he said they would never have done that, that some one else did! But the funny thing is NO one ever went in the valve body except Level 10 I had to pay thousands of dolars to the local dealer to get the problem rectified that Level Ten Transmissions created! These guys don't know what they are doing!!