Product Description
The 6L80 transmission represents GM’s advanced Hydra-Matic 6-speed technology, featuring gear ratios of 4.03:1 (1st), 2.36:1 (2nd), 1.53:1 (3rd), 1.15:1 (4th), 0.85:1 (5th), and 0.67:1 (6th overdrive) for optimal acceleration and highway cruising. Compatible with 2006-present Chevrolet Silverado/Tahoe, GMC Sierra/Yukon, Cadillac Escalade, 2008-2013 Corvette C6, 2010-2015 Camaro SS, and Pontiac G8 models equipped with V8 engines, the 6L80 features electronic pressure control and lock-up torque converter technology.
Enthusiasts building complete performance drivetrains should explore our inventory of used engine including LS3, L99, and LT1 V8 powerplants compatible with 6L80 bolt patterns. Learn more about GM 6-speed transmissions. Every 6L80 transmission undergoes solenoid testing, pressure verification, torque converter inspection, and includes comprehensive warranty coverage ensuring reliable performance for street driving, towing applications, and high-performance builds requiring smooth shifting and durability.
Frequently Asked Questions
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What vehicles is the 6L80 transmission compatible with for swaps?
The 6L80 transmission fits 2006+ GM trucks (Silverado/Sierra 1500), SUVs (Tahoe/Yukon), 2008-2013 Corvette C6, 2010-2015 Camaro SS, and Pontiac G8. It’s increasingly popular for swaps behind LS and LT engines in classic cars, muscle cars, and hot rods using standalone TCM controllers and custom crossmembers from transmission specialists.
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How much horsepower can a stock 6L80 transmission handle?
Stock 6L80 transmissions reliably handle 440 lb-ft of torque or approximately 400-500 HP in factory configuration. With upgraded clutch packs, billet input/output shafts, performance valve body, and upgraded torque converter, the 6L80 safely supports 700-800 HP. Fully built units with hardened components handle 1,000+ HP in boosted LS applications.
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Is the 6L80 transmission reliable for daily driving and towing?
Yes, the 6L80 transmission demonstrates excellent reliability with proper maintenance including fluid and filter changes every 50,000-70,000 miles using Dexron VI ATF. The adaptive shift logic and wide gear ratios handle daily driving and moderate towing exceptionally well. Many units exceed 200,000 miles with routine maintenance, especially in truck and SUV applications.
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What’s the difference between 6L80 and 6L90 transmissions?
The 6L90 transmission is the heavy-duty variant of the 6L80, featuring reinforced planetary gearsets, wider clutch packs, and 650 lb-ft torque capacity versus 6L80’s 440 lb-ft rating. The 6L90 appears in HD trucks and high-performance applications. Both share similar external dimensions and gear ratios. Choose 6L90 for high-torque diesel or supercharged engines.
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Can I use a 6L80 transmission with LS engine swaps?
Absolutely. The 6L80 transmission pairs perfectly with LS-series engines (LS1, LS2, LS3, LS6, LSA, LS9) using factory bellhousing patterns. Electronic control requires standalone TCM or integrated engine management systems like Holley Terminator X. The 6L80 provides superior strength and two additional overdrive gears compared to older 4-speed automatic options for modern performance builds.
6L80 Transmission – GM 6-Speed Automatic Performance Gearbox
