GM 6L80 6-Speed Automatic Transmission

Get dependable automatic performance with this GM 6L80 6-Speed Automatic Transmission, sourced from a clean, running donor vehicle and prepared for replacement or performance applications. The 6L80 combines six forward speeds with dual overdrive gearing and a deep 4.02:1 first gear, providing strong launch characteristics while keeping engine RPM lower during highway cruising. Each unit is mechanically inspected and tested before shipping.

Why Choose the 6L80 Transmission?

The 6L80 transmission is a popular GM automatic used across a wide range of applications and is especially common in LS-powered performance and swap projects. Its six-speed design provides closer gear spacing than older four-speed automatics, while the overdrive ratios make it practical for street and highway use.

The deep 4.02:1 first gear also provides strong mechanical advantage for off-the-line acceleration and helps make the 6L80 a versatile choice for performance-oriented builds.

Inspected & Diagnostic Tested

Every GM 6L80 transmission undergoes a detailed inspection process before shipping. Units are sourced from running donor vehicles and checked to help verify mechanical and electronic operating condition.

Testing includes:

• Mechanical inspection
• Transmission pressure testing
• Internal TEHCM diagnostic checks
• Gear engagement verification
• General operating checks
• Cleaning and preparation

These procedures provide additional confidence when selecting a used 6L80 automatic transmission for a replacement or swap.

Complete with Torque Converter

This 6L80 transmission for sale comes complete with its torque converter, helping simplify the drivetrain replacement process. The transmission is also supplied with a cleaned 18-bolt oil pan, preserving the original configuration while giving the unit a clean, prepared appearance.

Including the torque converter with the transmission can also reduce the need to source critical drivetrain components separately.

Built for GM Replacements & LS Swaps

The 6L80 6-speed automatic transmission is a natural fit for many GM-powered projects and is frequently considered for LS-based builds. Its electronic control system and six-speed overdrive design make it well suited to modernizing classic vehicles and supporting street-driven performance applications.

For custom swaps, verify the specific transmission version, bellhousing pattern, electronics, controller requirements, driveshaft, crossmember, torque converter, and vehicle compatibility before purchasing.

GM 6L80 Transmission Specifications

A Practical 6L80 Replacement

For buyers searching for a 6L80 transmission for sale, sourcing a complete tested unit can simplify a replacement project compared with purchasing an untested transmission and sourcing supporting components separately.

The included torque converter and prepared oil pan make this package a practical starting point for a compatible GM replacement or LS-powered project.

Backed by a 1-Year Replacement Warranty

This GM 6L80 automatic transmission is backed by a 1-year replacement warranty, adding confidence to your purchase. Combined with donor-vehicle sourcing, mechanical inspection, pressure testing, and TEHCM diagnostics, the warranty provides additional protection for your drivetrain investment.

Shop the GM 6L80 Transmission

If you’re looking for a GM 6L80 6-speed automatic transmission for a replacement or LS swap, this unit provides six-speed gearing, a 4.02:1 first gear, dual overdrive, and a complete torque converter. Thoroughly inspected and diagnostically tested, it’s a practical automatic transmission solution backed by a 1-year replacement warranty.