4L80e Transmission

4L80E Automatic Transmission

The GM 4L80E transmission is a 4-speed electronically controlled automatic transmission designed for demanding applications. It is widely used in GM trucks, vans, SUVs and performance builds and is also a popular choice for engine-swap projects.

Chevrolet Performance lists the 4L80E as an electronically controlled transmission and gives its performance transmission series a 440 lb-ft maximum torque capacity. Actual capacity can vary significantly with the specific transmission, build and application.

Key Specifications

• Transmission: GM 4L80E
• Type: 4-Speed Automatic
• Control: Fully electronic
• Drive: Primarily RWD / 4WD applications
• Gear: 4 forward speeds + reverse
• Overdrive: Yes
• Application: Trucks, SUVs, vans, performance and custom swaps
• Controller: Required for electronic operation in swap applications

Common Applications

Depending on the exact transmission version, 4L80E units have been used in:

• Chevrolet Silverado
• Chevrolet Suburban
• Chevrolet Tahoe
• Chevrolet Express
• GMC Sierra
• GMC Yukon
• GMC Savana
• Cadillac Escalade
• Chevrolet Performance and custom engine-swap builds

GM/ Chevrolet Performance documentation covers 4L80E/4L85E transmission families from different model years, so the exact transmission must be matched to the vehicle and electronics.

Swap Requirements

A 4L80E swap may require:

• Transmission controller/TCU
• Correct wiring harness
• Torque converter
• Transmission crossmember or mount modification
• Driveshaft modification
• Correct flexplate and hardware
• Transmission cooler and lines
• Speed-sensor integration
• Proper ECU/TCU calibration