The 4L80E: GM's Heavy-Duty Electronic Transmission Legacy
The 4L80E stands as General Motors' premier heavy-duty automatic transmission, developed as the electronic evolution of the legendary TH400. First introduced in 1991, this robust transmission was engineered specifically for high-torque applications and heavy-duty service.
Core Design Features:
The 4L80E's architecture is built around a cast iron case housing four forward gears with a 2.48 first gear ratio, providing optimal launch characteristics for heavy vehicles. Its standout feature is the massive input shaft, significantly larger than its lighter-duty 4L60E cousin, capable of handling torque loads up to 440 lb-ft in stock form.
Electronic Integration:
Unlike its TH400 predecessor, the 4L80E incorporates sophisticated electronic controls through the PCM/TCM. This includes:
Electronic Pressure Control (EPC) solenoid for precise line pressure management
PWM-controlled torque converter clutch
Shift timing solenoids
Internal Mode switch for gear position monitoring
Common Applications:
Verified applications include:
Chevrolet/GMC 2500HD/3500HD trucks
Hummer H1
Performance vehicle conversions
Known Strengths (Verified through GM Technical Data):
Exceptional torque capacity
Robust planetary gear sets
Reliable hydraulic system
Strong brake band design
Effective cooling circuit design
4L80E Automatic Transmission Rebuild (4L80)
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Carry Out 4L80E (No Torque Converter) $2,850 Starting Price
Our professional 4L80E rebuild includes complete disassembly, inspection, and reassembly with premium components including new high-capacity clutch assemblies, updated pressure control solenoid, TCC PWM solenoid, and heavy-duty accumulator assembly. Each transmission receives our durability package featuring a hardened 300M input shaft, factory-updated 6-pinion planetary set, reinforced forward and direct clutch packs with Kolene steels, and recalibrated EPC solenoid for precise line pressure control. Backed by our comprehensive 12-month/12,000-mile warranty covering rebuild labor and soft parts.
CARRY-OUT | NO CONVERTER - Starting at $2,850+
Upgraded Planets are Additional
Billet Parts are Additional
(North Carolina Taxes are Additional)
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Carry out 4L80E (with Torque Converter) $3,050 Starting Price
Our complete 4L80E package includes our professional rebuild with all premium components plus a remanufactured OEM-style torque converter featuring new heavy-duty thrust bearings, multi-layer TCC friction material, precision balanced assembly, pressure testing, proper endplay verification, updated apply piston, and factory-spec stall speed. Full package backed by our comprehensive 12-month/12,000-mile warranty covering rebuild labor, soft parts, and remanufactured converter.
CARRY-OUT WITH CONVERTER - Starting at $3,050+
(North Carolina Taxes are Additional)
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4L80E (TURN KEY) Pull it Tear Down Rebuild Install with T.C. & Fluid $3,250 Starting Price
Our turnkey 4L80E service includes professional removal and installation labor, complete transmission rebuild with all premium components, remanufactured torque converter, new transmission mount, filter service, and fluid. Service includes computer diagnostic scan, test drive verification, and leak test. Complete package backed by our local 24-month/24,000-mile warranty covering soft parts, labor, and remanufactured converter.
TURN-KEY INSTALLATION - Starting at $3,250+
Limited Warranty if Customer Supplies Converter*
(North Carolina Taxes are Additional)
We are not charging $400 for Remove and Replace - we are providing a discount if you let us do the job - we prefer to do the entire job!