About National Transmission

Family owned and operated for over 30 Years in Glenwood Springs!

National transmission in Glenwood Springs Colorado is your best solution for any Transmission, drive shafts, axles, u-joints, clutches and torque converters. When you work with National Transmission your will be working with the owner operator Joel Hendershot. Joel has been working with transmissions for over 45 years, and he is the best source for troubleshooting any drive train problem.

We have been serving the valley since 1989! Now at a new location in West Glenwood!

Our shop is owned and operated by Joel Hendershot. He started out at his dad’s mechanic shop in New Jersey in the late 60’s as a teen and has grown up building transmissions. He moved to Glenwood in 1989 to start his own business and has been a local favorite ever since. We strive to give our customers honest, quality and affordable work- only doing the work you need!

Our service area from Aspen Valley, including Basalt, Snowmass and Carbondale. We also service the I-70 corridor Vail to Battlement Mesa and everywhere in between, centrally located in Glenwood Springs.

Our employees have a combined 90yrs in automotive industries.  We stay up to date on the newest information and are members of the Automatic Transmission Rebuilders Associate (ATRA) tech program, the Transgo research program, and the Better Business Bureau.

Our Services

Clutch Replacement, Manual Transmission Repair & Flywheel Turning

Fixing issues in manual transmissions, replacing worn clutches. Flywheel Turning: Resurfacing flywheels for better performance.

Transmission & Transfer Case Rebuild

Restoring damaged or worn-out transmissions and transfer cases to optimal functionality. This comprehensive process involves disassembling, inspecting, replacing faulty parts, reassembling, and testing for reliable performance.

Servicing and Adjusting Transmission

Maintenance procedures to ensure smooth operation of the transmission. It involves fluid change, filter replacement, and adjustments to maintain proper gear shifting, extending the lifespan, and preventing potential issues.

Transmission Parts in Stock

A wide selection of essential components readily available for various transmission models. Customers can find gears, clutches, bearings, and other parts, enabling quick repairs and replacements, reducing downtime, and ensuring efficient transmission performance.

CVT Transmission Repair

Specialized service for Continuously Variable Transmissions (CVT). Expert technicians diagnose and fix CVT issues, addressing belt and pulley problems, fluid leaks, or software malfunctions to restore smooth and efficient performance, ensuring optimal driving experience.

Specialty HD Transmission

Tailored for heavy-duty applications, these transmissions are designed to withstand high torque and stress. Ideal for commercial vehicles, trucks, and industrial machinery, they offer enhanced durability, reliability, and superior performance, meeting the demands of rigorous workloads.

Rebuilt Transmissions in Stock

A range of remanufactured transmissions available for various makes and models. These transmissions undergo rigorous refurbishment, replacing worn components, ensuring quality and reliability. Customers can find cost-effective solutions for their vehicle's transmission needs, reducing downtime and promoting smoother driving.

Why Choose Us

Parts Stocked
  •  We keep Used and New parts in stock
  • Torque converters and rebuild kits
  •  We have rebuilt transmissions for most GM, DODGE, and FORD

Our employees have over 90 years combined experience and will recommend the best repair. We strive for excellence and our employees are constantly keeping up to date on the newest technology. We are members of the better business bureau, Transgo technical and ATRA technical.

Our shop has been helping locals with their transmission problems, any local knows National Transmission is the one best high country option for transmission repair.

Contact Us