Certified Transmission Service by Experts with 75+ Years of Experience - At Sergeant, we specialize in the diagnosis, service, and repair of - automatic transmissions in all makes and models. Located in San Antonio, Texas, our expert mechanics have over 75 years of combined experience in the transmission repair industry, and we’re committed to getting the job done right — at a fair price.
High-Tech Transmission Repair for Today’s Vehicles - Modern automatic transmissions are computer-controlled, high-tech systems that require precise diagnostics and specialized knowledge. Today’s vehicles depend on onboard computers and advanced sensors to ensure smooth shifting and optimal performance. Diagnosing and repairing these systems accurately requires state-of-the-art tools and expertise.
At Sergeant Clutch, we use the same diagnostic technology as the dealerships, including:
- Advanced scanner tools to access your vehicle’s onboard computer system
- Real-time data stream analysis to pinpoint system failures or malfunctions
- Manufacturer-specific trouble code interpretation to ensure proper repair
- Hands-on inspection by trained and certified transmission mechanics
Why Trust Sergeant Clutch for Automatic Transmission Repair?
- Certified Mechanics with Decades of Experience
- Cutting-Edge Diagnostics & Equipment
- Accurate Computer-Based Troubleshooting
- Affordable Pricing & Honest Recommendations
- Flexible Payment Plans Available
- Conveniently Located in San Antonio, TX
Whether your transmission is slipping, shifting hard, leaking fluid, or causing warning lights to appear, don’t wait for the problem to get worse. Bring your vehicle to Sergeant Clutch Certified Transmission & Engine Repair Shop or a thorough transmission inspection. Call Today or Visit Us at 6557 Walzem Road, San Antonio, TX for a Free Estimate!
Is Your Check Engine Light On? Let Sergeant Clutch Certified Transmission & Engine Repair Shop, Diagnose the Problem — Fast and Accurately! When your Check Engine Light, Service Engine Soon Light, or Transmission Warning Light comes on, it’s your vehicle’s way of telling you something isn’t right. At Sergeant Clutch Certified Transmission & Engine Repair Shop in San Antonio, TX, we specialize in computer diagnostics to find and fix the issue before it turns into a more expensive repair.
What Does the Check Engine Light Mean? Modern vehicles are equipped with onboard computer systems that monitor and control nearly every aspect of your car’s performance — from the engine and transmission to the emissions system, sensors, and fuel delivery. When the system detects a problem, it stores a trouble code and triggers a warning light on your dashboard.
This light could indicate:
- Engine misfire
- Transmission shifting issues
- Faulty oxygen or mass airflow sensors
- Emissions control failures
- Fuel system or ignition problems
- Loose or damaged gas cap
Why You Shouldn’t Ignore It - Driving with an active warning light can lead to:
- Reduced fuel efficiency
- Poor engine or transmission performance
- Long-term damage to internal components
- Failed state emissions testing
What We Do at Sergeant Clutch Certified Transmission & Engine Repair Shop- Our technicians use advanced diagnostic scanners to:
- Retrieve trouble codes from your vehicle’s computer
- Analyze real-time sensor data
- Identify the root cause of the warning light
- Recommend the proper repair or adjustment needed
- Same diagnostic tools as dealerships — without the dealership price.
Is Your Transmission Light On? Accurate Transmission Diagnostics at Sergeant Clutch Certified Transmission & Engine Repair Shop – San Antonio, Texas. If your Transmission Warning Light, Check Engine Light, or Service Engine Soon Light is on, your vehicle is telling you something is wrong. But without a professional diagnostic scan, it’s impossible to know exactly what the issue is.
At Sergeant Clutch Certified Transmission & Engine Repair Shop in San Antonio, Texas, we offer a Transmission Diagnostic Performance Check to accurately assess the health and performance of your transmission.
Why Transmission Warning Lights Matter - Modern transmissions are computer-controlled, and your vehicle’s onboard system constantly monitors performance. When something goes wrong — whether it’s a small sensor malfunction or internal mechanical issue — a warning light is triggered. Sometimes you’ll notice symptoms like shifting issues or strange noises. Other times, there may be no obvious signs at all.
What’s Included in Our Transmission Diagnostic Performance Check? Our step-by-step transmission diagnostic service allows our certified transmission mechanic to identify the source of the problem and recommend the right solution — quickly and accurately.
Transmission Fluid Inspection
- First indicator of potential issues
- Fluid color, smell, and consistency checked
- Burnt odor or discoloration may signal internal damage
Road Test
- Stationary and driving tests
- Evaluates initial engagement, slipping, vibrations, noises
- Checks shifting behavior (harsh, soft, delayed, erratic)
- Verifies torque converter clutch engagement and passing gear
Under-Car Inspection
- Examines transmission linkage, mounts, and components
- Checks for leaks or external damage
- Identifies visible signs of wear or needed adjustments
Transmission Pan Examination
- Internal inspection without full teardown
- Reviews pan for excessive metal shavings or contaminants
- Assesses potential internal damage
Computer Diagnostic Scan
- Retrieves error codes from your car’s computer
- Analyzes real-time transmission data
- Pinpoints sensor issues or electronic faults
What If the Problem Is Internal? If the Transmission Performance Check reveals signs of internal damage, we may recommend an Internal Transmission Inspection. This involves:
- Removing and disassembling the transmission
- Inspecting all internal components for wear and failure
- Providing a full report and repair estimate based on findings
Why Choose Sergeant Clutch for Transmission Diagnostics?
- 75+ Years of Transmission Repair Experience
- State-of-the-art Diagnostic Equipment
- Certified Transmission Mechanics
- Affordable, Honest, Upfront Pricing
- Payment Plans & Financing Available
- Serving San Antonio and Surrounding Areas
