If you own a Chevy Silverado, GMC Sierra, Suburban, Yukon, or any GM vehicle equipped with a 6L80E or 6L90E 6-speed transmission, you know these transmissions need to be tough—especially when used for towing, off-roading, or performance driving. At Sergeant Clutch Certified Engine & Transmission Repair Shop in San Antonio, TX, we specialize in custom-built, high-performance transmission rebuilds that go far beyond stock.
🔧 Why Rebuild Your 6L80E or 6L90E with Sergeant Clutch?
We don’t just repair—we rebuild and upgrade your transmission based on how you use your vehicle. Whether you’re a daily commuter, hauling heavy trailers, or racing on the weekends, we build transmissions to last.
Our expert techs use the latest tools, software, and components to restore and improve the performance of your GM 6-speed transmission.
💪 Transmission Upgrades Include:
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Heavy-Duty Torque Converters
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Billet Torque Converter Options
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Shift Kit Installations for crisper, faster gear changes
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Upgraded Friction Materials & Bands
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Billet Steel Hard Parts for extreme-duty performance
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Performance Reprogramming & Tuning Support
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Custom Valve Body Modifications
We tailor every build to meet your vehicle’s demands—no cookie-cutter rebuilds here.
🛠️ Common Signs Your 6L80E or 6L90E Needs Service
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Slipping or delayed shifting
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Overheating transmission fluid
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Torque converter lock-up failure
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Harsh or inconsistent gear engagement
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Limp mode or check engine light
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Shuddering or vibration under load
If you notice any of these, call us immediately. We offer free diagnostics with repair and affordable pricing options.
🚚 Free Towing & Flexible Financing Available
Need help getting your truck to the shop? We offer FREE towing with major transmission service in the San Antonio area. We also work with several financing providers:
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Synchrony Car Care – 6 months interest-free*
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Snap Finance – No credit needed
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EasyPay Finance – Lease-to-own with flexible terms
*On approved credit.
🔧 Serving All of San Antonio and Beyond
We proudly serve:
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San Antonio
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Converse
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Universal City
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Windcrest
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New Braunfels
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Schertz
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Randolph AFB & nearby areas
📞 Call Sergeant Clutch Today – Transmission Experts Since 2003
With over 20 years of trusted experience, Sergeant Clutch is San Antonio’s go-to shop for reliable, heavy-duty, and performance-ready transmission rebuilds.
📍 Visit us at 6557 Walzem Rd, San Antonio, TX 78239
📱 Call us at (210) 239-1600
🌐 https://www.sergeantclutchdiscounttransmission.com/
Don’t trust your 6L80E or 6L90E transmission to just anyone—Call the Sergeant!
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