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


Our St. Louis shop, is located at 12598 Lusher Road, Saint Louis, MO. 63138 and has been serving Missourians in Florissant, Hazelwood and Spanish Lake, as well as our customers in the Alton, Illinois area with quality transmission work at a fair price for more than 40 years.

St. Louis

For more than 4 years, Our newest shop located at *803 US Hwy Route 40, in Greenville IL. 62246, taken great pride in providing quality customer service to the residents of Greenville, Highland and the surrounding communities with the same level of quality service and value as our original location.

*A note of caution: You may click on the link below to get accurate directions from Google.  Otherwise, using our address, the online mapping tools do not correctly provide directions to our Greenville Location.  While we work on this issue, please remember that we are located approximately 2 miles west of exit 41 on US Route 40 (north service road.)  If you need additional directions, just give us a call.

Whether you have a need for us in Missouri or Illinois, know that we will treat you and your vehicle with respect and provide you outstanding customer service and value.