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3L80 Transmission parts

TH375, TH400

Transmission general data

Number of gears Transmission Type Drive Torque (Nm) ATF (full capacity) L ATF (change) L ATF type (recommended)
3 AT RWD 340 12 5 Dexron III

3-speed automatic gearbox THM (Turbo Hydromatic) 400, also named as 3L80). Turbo-Hydramatic is a patented name for the family of automatic gearboxes designed and produced by GM.

What are you looking for?

Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor

Which cars run with this gearbox? CLICK

Technical issues and repair guidelines

This gearbox 3L80 has a simple and reliable design. All parts are made of solid materials. Shifting of gears is implemented very smoothly and almost unnoticeable. The main disadvantages of this automatic transmission are significant dimensions and weight of the transmission. This transmission is considered to be the most reliable in the history of GM (the most enduring).