Sonny’s Transmission Warranty Plan

Your transmission is one of the most important parts of your vehicle, so Sonny’s offers a 5-year or 100,000-mile transmission warranty plan. 

You are eligible for this exclusive warranty coverage when we work on your vehicle’s transmission.

We have a proven track record of successfully rebuilding both automatic and standard transmissions. We possess the expertise to accurately diagnose and repair your transmission. Our services extend to transmissions for both foreign and domestic vehicles. Rebuilding a transmission is a significant investment that safeguards your vehicle from potential future damage.

Learn more about transmissions by reading this!

Automotive Transmission Rebuilders Association

Sonny’s is a proud member of the Automotive Transmission Rebuilders Association.  When it comes to transmissions, we have you covered, with experience diagnosing, repairing, and guaranteeing your vehicle’s transmission.

Automatic Transmission Rebuilders Association

Benefits of a Transmission Warranty Plan 

  • Peace of mind.  Avoid future transmission expenses.  
  • Additional charges.  Other facilities may charge you twice to repair your transmission again. 
  • A good investment if you plan to hold on to your vehicle for a long time. 
  • We guarantee our work, which is important to you and us.

What is an Automatic Transmission?


Automatic transmissions are complex.  They use electronics and hydraulics to operate a series of drums, gears, and clutches. They also utilize an internal computer to control transmission operations.

Our Diagnostic Approach

What may have been diagnosed as an internal transmission failure may be a wiring, sensor, solenoid problem, and/or computer failure. 

Thus, Sonny’s uses state-of-the-art diagnostic tools to detect your automatic transmission issues.

Watch this video to see how an automatic transmission works.  

What is a Standard Transmission?


Standard transmissions are not as complex as automatic transmissions.  However, they need a complete analysis to determine any problems.

We often see standard transmissions with worn or broken clutches or clutch hydraulic problems. The clutch stops transmission movement so the driver can shift gears.

We will diagnose your standard transmission to determine the needed work.

Our Diagnostic Approach

We provide a standard transmission diagnosis free of charge. Whatever type of vehicle you drive, Sonny’s has expert technicians who can properly diagnose and repair your transmission.

Watch this video to learn how a standard transmission works.

Exclusions For Commercial Vehicles

Sonny’s Transmission Warranty Program excludes all commercial vehicles. (However, we can recommend where to take your commercial vehicle for necessary repairs.)

Getting Started | Next Steps

Contact us to schedule your transmission inspection.  Once we determine you have a transmission issue, we will provide you with a quote before starting repair work.

Phone: 636-458-2028


Hours: 8:00 – 5:00 (Monday through Friday). We are closed for lunch between 12:30 and 1:00 p.m., and we are closed on Saturday, Sunday, and all major holidays.  We like the time off, like you do.

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