The 5L40-E 5-speed automatic transmission is made by General Motors. It is electronically controlled, and has been fitted to a number of US vehicles, but is predominately found in BMWs in the UK.
The shifting in the 5L40-E automatic transmission is controlled by a series of springs that are meant to “cushion” the shift and make for a smooth ride. Unfortunately, these springs can break. Broken accumulator springs should be replaced as soon as possible, as repeated harsh shifting will greatly reduce the life of the affected clutches.
Output Shaft Wear
A common fault with the 5L40-E, particularly on larger vehicles such as the Ranger Rover, is for the output shaft spline to wear down to the point where it no longer functions. In cases like this, the vehicle may feel as though it is slipping, and a metallic noise will issue from the middle of the vehicle when an attempt to drive it is made. The only fix for this is to replace the output shaft.
Lockup Solenoid/Torque Converter Failure
The 5L40-E automatic transmission will begin to slip and, in cases where the problem is not found early enough, lose drive entirely. The problem is caused by the lockup solenoid inside the transmission failing, which causes the torque converter to fail in turn. Unfortunately, the problem is rarely caught in time, and the transmission will nearly always require a full overhaul.
Vehicles Running the GM 5L40-E 5-Speed Automatic Transmission
This list should be used as a guide only, there may be exceptions (cross-over models, for example) where a vehicle on this list is not running a 5L40-E automatic transmission, and there may be vehicles not on the list that are.
- 2004–2006 Cadillac CTS (RWD)
- 2005–2006 Cadillac STS (RWD)
- 2004–2006 Cadillac SRX (RWD)
- 2006 Pontiac Solstice
- 2007 Saturn Sky
- 2004–2006 Holden WL Statesman/Caprice (RWD)
- 2004–2006 Holden VZ Commodore (RWD)
- 2005–2009 Chevrolet Omega (RWD)
- 2006–2009 Holden VE Commodore (RWD)
- 2008–2009 Pontiac G8 (RWD)
- 2004–2006 Cadillac CTS (AWD)
- 2004–2006 Cadillac STS (AWD)
- 2004–2006 Cadillac SRX (AWD)
- 2002–2005 Range Rover (L322)
- BMW 3 Series (E46)
- BMW 5 Series (E39)
- BMW Z3
- BMW X5 (E53)