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)

  • 4L80E-transmission-rebuild-package-chevy-gm-automatic-transmission-service

    Carry Out 4L80E (No Torque Converter) $2,850 Starting Price

    4L80E PROFESSIONAL REBUILD
    $2,850+ (Carry-Out Service) 🔧

    ✅ Premium Rebuild Package Includes:
    • Complete disassembly & multi-point inspection
    • High-capacity clutch assemblies
    • Latest-design pressure control solenoid (PCS)
    • Updated TCC PWM solenoid
    • Heavy-duty accumulator assembly
    • Hardened 300M input shaft
    • Factory-spec 6-pinion planetary
    • Reinforced forward & direct clutch packs with Kolene steels
    • Calibrated EPC solenoid
    • All new seals, bushings, and solenoids

    Available Upgrades:
    • OEM-Spec Torque Converter: +$250
    • Heavy-Duty Planet Sets: Call For Quote
    • Billet Components: Call For Quote

    Input shaft

    Output shaft

    Drum assemblies

    Servo pistons

    ✅ 12-Month/12,000-Mile Warranty
    • Covers all soft parts components
    • Includes rebuild labor

    *Note: Warranty coverage modified if customer supplies converter

    (North Carolina Sales Tax Additional)

    Applications:
    • Chevrolet/GMC 2500HD/3500HD
    • Commercial vehicles
    • Performance applications
    • Heavy-duty towing

  • 4L80E-transmission-complete-installation-service-professional-rebuild

    4L80E COMPLETE TURNKEY SERVICE - $3,250+ Professional Removal • Supreme Rebuild • Expert Installation Includes OEM Converter & Fluid

    4L80E Complete Turnkey Service - $3,250+ 🔧

    ✅ Professional Service Package Includes:
    • Complete removal & reinstallation
    • Comprehensive transmission rebuild
    • OEM-spec torque converter
    • Premium synthetic fluid (Dexron VI)
    • Updated filter assembly
    • Full computer diagnostic scan
    • Performance verification testing

    Premium Rebuild Components:
    • Heavy-duty clutch packs
    • Updated pressure control solenoid (PCS)
    • Enhanced 2-4 band assembly
    • Heavy-duty forward drum
    • Updated servo assembly
    • All new seals & bushings
    • Premium filter kit
    • Latest-design solenoid pack

    Quality Assurance:
    • Computer diagnostic verification
    • Road test
    • Leak inspection

    ✅ 24-Month/24,000-Mile Warranty
    • Soft Parts & Labor coverage
    • Torque converter warranty
    • Installation guarantee

    *Note: Warranty coverage modified if customer supplies converter

    (North Carolina Sales Tax Additional)

    Applications:
    • Chevrolet/GMC 2500HD/3500HD
    • Commercial vehicles
    • Performance applications
    • Heavy-duty towing