Meet the Hands Behind the Repairs
The transmission is one of the most important—and intricate—systems in your car. It takes more than a hunch to get it right when it starts acting up. Sal’s Auto Service helps drivers in Dallas and Polk County stay safe on the road by applying decades of experience to every transmission repair. We are the shop you can rely on for sincere service and long-term solutions, whether you need a basic transmission fluid change, a slipping gear, or a complete gearbox repair.
Since 1956, we have provided services to our community with a commitment to excellence, transparency, and ethical behavior. Our local team will not lead you astray if your transmission is making noise, slipping, or simply doesn’t feel right.
Free Transmission Diagnostics You Can Trust
Transmission issues can escalate quickly. That’s why we offer free diagnostic checks to catch problems early. Our technicians check fluid levels and condition, scan for error codes, and inspect the physical components of your transmission using specialized equipment. Regardless of whether you drive an automatic, CVT, or manual transmission, we customize our approach to fit the specific make and model of your car.
Don’t wait if you’ve noticed fluid leaks, burning smells, odd noises, or hesitation when shifting. We’ll conduct a thorough assessment and review your options with you; there will be no pressure or pushy sales tactics.
Because your transmission is hidden beneath the surface, early warning signs can be easy to overlook. Here’s when to bring your car in for a transmission repair evaluation:
- You feel the car slipping between gears
- Shifts are delayed or rough, especially in cold starts
- Unusual noises when changing gears
- You smell burnt fluid or see red fluid under your car
- The check engine light is on
- It’s been over 30,000–60,000 miles since your last transmission fluid change
These signs may indicate worn components, low fluid, or more serious internal damage. Addressing them early can mean the difference between a minor repair and a costly rebuild.
When to Schedule Transmission Service

Why Choose Us
Transmission work is complex, and not every shop is equipped to do it properly. At Sal’s Auto Service, we bring both expertise and honesty to every repair. Here’s why Dallas drivers trust us with their most sensitive vehicle systems:
- Skilled technicians experienced in all transmission types
- Transparent estimates and clear explanations
- High-quality fluids and OEM-compatible parts
- Modern diagnostics that pinpoint issues accurately
- Family-owned integrity—no surprises, no pressure
Whether you need a minor gearbox repair or a complete automatic transmission service, we provide reliable work that gets you back on the road fast.
Types of Transmission Services We Offer
Our full range of transmission repair and maintenance solutions ensures that whatever your vehicle needs, we’ve got the tools and expertise to deliver.

Repairing a Gearbox
Worn gears or malfunctioning synchronizers can result in grinding, popping, or complete gear loss if you drive a manual or semi-automatic vehicle. To ensure precise and seamless shifting every time, we provide comprehensive gearbox repair services that include thorough inspection, component replacement, and resealing.

Service for Automatic Transmissions
The advanced automatic transmissions of today are sensitive to temperature, driving conditions, and fluid levels. To stop wear and prolong the life of your transmission, our automatic transmission service includes fluid flushing, filter replacement, and valve body inspections.

Fix for Transmission Slippage
You might require a transmission slipping repair if your vehicle is having trouble staying in gear, revving without moving, or shifting erratically. After looking for worn bands, solenoid failure, and irregular pressure, we will only replace or repair what is required. Change of Transmission Fluid

Change of Transmission Fluid
For component lubrication and heat management, clean fluid is necessary. Fluid deteriorates with time, losing its ability to shield your transmission. Every 30,000 to 60,000 miles, the transmission fluid should be changed to avoid internal damage, gear wear, and overheating. For enduring performance, we provide complete flushes and top-offs using premium-grade fluids.
Frequently Asked Questions
Is a slipping transmission still safe to use while driving?
You risk being stranded and suffering serious internal damage if you drive with a slipping transmission. If you notice any signs of slipping, we recommend seeking help immediately.
What is the cost of repairing a transmission?
The issue determines the cost. While major repairs or rebuilds are more involved, minor repairs like fluid changes or sensor replacements are more reasonably priced. We provide precise quotes upfront with no obligations.
How frequently should I have my gearbox fluid changed?
The transmission fluid in the majority of cars needs to be changed every 30,000–60,000 miles. Synthetic fluid might have a longer lifespan. To suggest the ideal schedule, we review your owner’s manual and driving patterns.