page_title: GM 4L80-E transmission
section_title: 4L80-E
hierarchical_section_title: GM 4L80-E transmission / 4L80-E
caption_attribution_description: English: A Hydra-Matic 4L80 transmission at the Ypsilanti Automotive Heritage Museum in Ypsilanti, Michigan (United States).
context_page_description: The 4L80-E was a series of heavy-duty automatic transmissions from General Motors designed for longitudinal engine configurations. The 4L80-E was heavily based on the Turbo-Hydramatic 400 first produced in October 1963, adding electronic controls and an overdriven fourth gear. 4L80-Es were optioned only in Chevrolet/GMC pickups, Suburban 2500s, vans, and commercial vehicles, and the Hummer H1. It was also adopted by Rolls-Royce in 1991 and modified after extensive testing, and used initially in the Bentley Continental R, and subsequently other Rolls-Royce and Bentley vehicles. The 4L80E and 4L85E were built at Willow Run Transmission in Ypsilanti, Michigan.
  Gear ratios:
context_section_description: The 4L80-E (RPO MT1) is rated to handle engines with up to 440 ft·lbf (597 N·m) of torque. The 4L80-E is rated to max GVWR of 18,000 (Axle and vehicle dependent)
  The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. By activating and deactivating the solenoids in a predetermined pattern by the PCM, 4 distinct gear ratios can be achieved. The shift solenoid pattern, also sometimes referred to as solenoid firing order, is as follows;
caption: A Hydra-Matic 4L80 transmission at the Ypsilanti Automotive Heritage Museum
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