GM 4L80-E transmission

4L80-E/4L85-E
Overview
ManufacturerGeneral Motors
Production1991–2009
Body and chassis
Class4-speed longitudinal automatic transmission
Chronology
PredecessorTurbo-Hydramatic 3L80 / THM400
Successor6L90

The 4L80-E (and similar 4L85-E) is a series of automatic transmissions from General Motors. Designed for longitudinal engine configurations, the series included 4 forward gears. It was the 4-speed electronically commanded evolution of the 3-speed Turbo-Hydramatic 400, first produced in October 1963. 4L80-Es were optioned only in Chevrolet/GMC pickups, vans, and commercial vehicles, and the Hummer H1. It was also adopted by Rolls-Royce in 1991 and modified after extensive testing,[1] and used initially in the Bentley Continental R, and subsequently other Rolls-Royce and Bentley vehicles. The 4L80 and 4L85 were built at Willow Run Transmission in Ypsilanti, Michigan.

  1. ^ Adcock, Ian (1992). Bentley Continental R. London: Osprey Publishing. p. 113. ISBN 185532-260-9.