High Country Transmission...serving the Denver area since 1975! To service today's transmissions, you need technical skills and years of training. Our technicians are qualified to perform everything from maintenance and minor repairs to complete rebuilds on manual and automatic transmissions, including American and imports. Free Basic diagnostic test, Electrical Diagnosis, Automatic Transmission. Manual Transmission, Clutches, Differentials, High Performance Specialists, Transfer Cases, Drive lines, Axel & CV Joints, Flywheels, Flexplates, Coolers. Call or stop by today!