Diesel Transmission Service

Looking to upgrade your diesel transmission? Hy-Tech Transmissions specializes in rebuilding and upgrading diesel transmissions for maximum performance. 

See our DIESEL TRANSMISSION service page for more info!

Our Hours

  Monday 8AM - 5PM
  Tuesday 8AM - 5PM
  Wednesday 8AM - 5PM
  Thursday 8AM - 5PM
  Friday 8AM - 5PM
  Saturday CLOSED
  Sunday CLOSED


Click for the BBB Business Review of this Auto Repair & Service - Diesel in Saint Louis MO

Auto Repair & Transmission Service

Hy-Tech is family owned, ATRA certified transmission and auto repair business with more than 40 years of experience in providing our customers with quality repair work and attentive customer service.

We run a clean and well organized shop, which allows us to complete your repair quickly and correctly the first time.

We offer a full range of automotive service including specialization in Automatic and Manual Transmissions, Clutch Work, Transfer Cases, Differentials, and 4x4 service.  We also provide Electrical Diagnostics, Drive Shaft Service, U-Joints, General Auto Repair, Tune-ups, Brake Service, Suspensions, Water Pumps, and other General Maintenance.  We also provide a wide variety of diesel upgrades for both stock and performance applications, to include anything from simply towing & pulling trucks.