GM 4T40 transmission

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4T40/4T40-E/4T45/4T45-E
Manufacturer	General Motors
Production	1995–present
Predecessor	Turbo-Hydramatic 125
Class	4-speed transverse automatic transmission
Similar	Ford CD4E Chrysler A-670

The 4T40 (and similar 4T40-E, 4T45, and 4T45-E) are a series of automatic transaxles from General Motors. Designed for transverse engine configurations, the series includes 4 forward gears. The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the early 1970s.

The "-E" series is electronically controlled and features an automatic overdrive transaxle with an electronically controlled torque converter clutch.

The 4T40 and 4T45 are assembled at Windsor Transmission in Windsor, Ontario, Canada.

1 4T40
2 4T45
3 References
4 See also

[edit] 4T40

The "MN4" 4T40E is able to handle vehicles up to 4000 lb (1814 kg) GVWR. The final drive ratio is 3.63:1. It is designed for 1.5–3.1 L engines producing up to 190 ft·lbf (258 N·m) of torque.

Gear ratios:

1	2	3	4	R
2.95	1.62	1.00	0.68	2.14

Applications:

1995–2005 Chevrolet Cavalier
1995-1996 Chevrolet Beretta
1995-1996 Chevrolet Corsica
1995–2005 Pontiac Sunfire
1997–2003 Chevrolet Malibu
1999–2005 Pontiac Grand Am
1999–2004 Oldsmobile Alero

[edit] 4T45

The "MN5" 4T45E is able to handle vehicles up to 4500 lb (2041 kg) GVWR. Final drive ratios include 3.63, 3.29, 3.05, and 3.91. This same transmission is used in the Saturn VUE Green Line hybrid vehicle with the addition of an auxiliary oil pump and hybrid-aware electronics. It is designed for 3.0–3.4 L engines producing up to 205 ft·lbf (278 N·m) of torque.

Gear ratios: