The 6L80/90E: GM's Modern 6-Speed Legacy & Known Issues
The 6L80E and its heavy-duty variant, the 6L90E, represent GM's first fully electronic 6-speed automatic transmission platform, introduced in 2006. Designed for longitudinal engine applications, these transmissions marked a significant technological leap from the 4L60E/4L80E series, featuring:
Design Architecture:
Six forward speeds with two overdrive ratios
Integrated TCM (Transmission Control Module)
Advanced adaptive shift technology
Maximum torque ratings:
6L80E: 440 lb-ft
6L90E: 665 lb-ft
Critical Failure Analysis (Verified Through Technical Service Bulletins):
The most documented issue centers around torque converter failure, typically manifesting around 120,000 miles. Primary failure points include:
TCC (Torque Converter Clutch) material delamination
Failed needle bearings in converter hub
Compromised converter seal integrity
Internal bushing wear leading to metal contamination
Cascade Effect (Documented Through Professional Analysis):
When torque converter failure occurs, metal particulate contamination typically leads to:
Valve body solenoid damage
Channel plate scoring
Clutch pack contamination
Pump assembly wear
Planetary gear set damage
Common Applications Affected:
Chevrolet Silverado/GMC Sierra (2007-2019)
Cadillac Escalade
GMC Yukon
Chevrolet Tahoe/Suburban
Chevrolet Camaro (LS3/L99)
Technical Service Pattern (Verified Through Dealer Data):
Initial symptoms appear 100,000-115,000 miles
TCC shudder becomes noticeable
Transmission fluid shows metallic contamination
Complete failure typically by 120,000-130,000 miles
6L80E/6L90E Remanufactured Transmission (ETE | GMC)
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REBUILT 6L80/90 (No Torque Converter - Performance Build Only) $4,650 Starting Price
WILL BE MORE EXPENSIVE THAN REMAN OPTION!!
Our 12-month/12,000-mile limited warranty covers internal soft parts only, including friction clutch packs, sealing rings, gaskets, seals, solenoids, filter, O-rings, bushings, band material, and thrust washers. This warranty explicitly excludes the case, valve body, pump assembly, planetary carriers, sun shell, output shaft, input shaft, and torque converter. No coverage is provided for labor, fluids, removal/installation costs, towing expenses, or rental vehicles.
Warranty validation requires maintaining proof of purchase, documented fluid level checks, and adherence to factory GVWR specifications. The warranty becomes immediately void due to racing/competition use, TCM calibration modifications, fluid neglect, external damage, improper installation, exceeding torque specifications, commercial use, off-road use, or any form of racing application. All warranty claims must be pre-authorized and include detailed documentation of failure.
NO CONVERTER - Starting at $4,650+
TORQUE CONVERTER IS EXTRA!
Upgraded Parts are Additional
Billet Parts are Additional
50% Deposit Required_
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Remanufactured 6L80/90 Transmission Swaps (Turn-key) Included OEM Flash and bypass valve. $5,500 Starting Price
ETE Reman's 5-Year/Unlimited Mile Nationwide Coverage
TURN KEY JOB - WE PULL IT SWAP IT FLASH IT AND TEST DRIVE
COMPREHENSIVE COVERAGE INCLUDES:
Complete transmission assembly
Torque converter
All internal parts
Solenoids & sensors
Valve body
Pump assembly
Case & housing
Labor reimbursement up to $100/hour
Fluids up to 16 quarts
Nationwide repair facility network
ETE REMAN 6L80/90 SWAP - Starting at $5,500+
Deposit Needed: $4,000
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Billet Torque Converter Upgrade * Remanufactured 6L80/90 Transmission Swaps (Turn-key) Included OEM Flash and bypass valve. $6,000 Starting Price
ETE Reman's 5-Year/Unlimited Mile Nationwide Coverage
TURN KEY JOB - WE PULL IT SWAP IT FLASH IT AND TEST DRIVE
BILLET TORQUE CONVERTER UPGRADE - (BILLET COVER)
COMPREHENSIVE COVERAGE INCLUDES:
Complete transmission assembly
Torque converter
All internal parts
Solenoids & sensors
Valve body
Pump assembly
Case & housing
Labor reimbursement up to $100/hour
Fluids up to 16 quarts
Nationwide repair facility network
ETE REMAN 6L80/90 SWAP - Starting at $6,000+
Deposit Needed $4,500.00