6L80E 2013-2014 GM Full-Size Trucks & SUVs AWD/4WD – Remanufactured 6-Speed Automatic Trans

Description

Directing up to 403 horsepower across all four driven wheels, this heavy-duty powertrain system supports 417 lb-ft of continuous torque under 290 PSI line pressure during severe commercial transport service. Fleet supervisors select the GMC Yukon 6L80E Remanufactured Transmission for 2013 to 2014 GM full-size AWD vehicles requiring uncompromising gear engagement and low internal friction. Factory-upgraded hydraulic valving eliminates converter lockup oscillation during severe service cycles.

A380 die-cast aluminum casing structures provide rigid support against heavy driveline twisting forces. Heat-treated iron planetary gearsets feature precision-ground teeth that eliminate gear whine and tooth chipping under stress. Carbon-metallic friction plates incorporate spiral oil paths to cool friction surfaces during rapid downshift cycles. Hard-anodized Sonnax sleeves restore worn valve channels to halt pressure loss. The unit scales at 215 lbs dry, holding 12.0 quarts of DEXRON-VI with factory cooler ports.

Key Features of GMC Yukon 6L80E

Severe clutch pack burnout caused by fluid bypass in worn valve bores compels fleet operations to buy GMC Yukon 6L80E remanufactured transmission units. Upgraded hydraulic control circuits restore full torque capacity across demanding all-wheel-drive regional transit routes.

• A wide 4.03:1 first gear step provides tremendous pulling power during vehicle startup.
• High-grade 8620 steel carrier pins maintain precise gear alignment under maximum engine torque output.
• Radial clutch groove architecture expels hot oil rapidly to prevent friction face glazing.
• Working line pressures scale up to 290 PSI to prevent slip under high engine loads.
• Standard cooling line connections integrate with factory remote transmission oil coolers.
• Sonnax bore sleeves eliminate internal cross-leaks to stabilize the 6L80E valve body hydraulics.
• Heavy-duty furnace-brazed converter turbines resist mechanical distortion under sudden engine torque spikes.

Hydraulic Line Pressure Dynamics

Regulating internal fluid circuits between 215 and 290 PSI prevents clutch slip under high-load acceleration. Internal fluid temperatures maintain a stable 160°F to 190°F range during continuous mountain transit. Absorbing 417 lb-ft of engine torque at 4400 RPM, the gear cluster transitions from 4.03:1 in first down to 0.67:1 in sixth overdrive. Dedicated thermal exchange systems dissipate 950 BTU per minute to shield friction packs from destructive fluid overheating.

All-Wheel Drive Center Spline

Interfacing with the transfer case drive collar, the 32-tooth output spline prevents lash under sudden power shifts. Forged chrome-moly steel metallurgy resists torsional deformation during sudden front-to-rear torque redistributions. Heavy-duty parking pawl mechanisms withstand 1,600 lb-ft of holding force on steep grades. Certified dial indicator inspections verify total shaft runout measures under 0.003 inches total indicator reading.

Electronic Valve Body Calibration

Perform complete TCM adaptive drive cycle procedures following installation to set correct clutch volume indexes. This transmission is not engineered for track drag racing, extreme rock crawling, or gross combined vehicle weights exceeding factory chassis tow limits. Commercial fleet technicians must follow established preventative fluid maintenance guidelines.

• Each shift scan electronic transmission controllers for pending diagnostic trouble codes.
• Every 30 days check external fluid fittings and casing mating joints for leaks.
• Every 30,000 miles drain the transmission pan, install new filtration, and replenish fluid.

Verified Fleet Assurance Terms

Comprehensive fleet investment protection comes standard through a 3-Year / 100,000-Mile commercial fleet warranty covering powertrain failure. Secure wooden crates contain the fully remanufactured transmission unit, balanced torque converter, replacement line seals, technical documentation, and certified dynamometer pass sheets.