GM 4T65-E transmission

The 4T60-E (and similar 4T65-E) is a series of automatic transmissions 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" transmission is electronically controlled and features an automatic overdrive transaxle with an electronically controlled torque converter clutch.

The 4T65 is built at Warren Transmission in Warren, Michigan.

4T60

Main article: Turbo-Hydramatic 125

The 4T60 was the transitional model from the old Hydramatic to the new electronically-controlled transverse family. Introduced in 1983 on the 1984 G-bodies, it was enhanced with electronic controls to become the 4T60-E in 1988. By the mid-1990s, the 4T60-E was the transmission of choice in nearly every front-wheel drive GM vehicle. A heavy-duty 4T60-E HD was introduced in 1993 for the supercharged GM 3800 engine. The 4T60-E was phased out in favor of the 4T65 beginning in 1997.

The 4T60 featured a 245 mm torque converter.

Applications:

• 4T60-E
  • 1994–1996 Chevrolet Beretta/Corsica V6 3.1 L
  • 1992–1996 Chevrolet Lumina APV V6 3.4 L/3.8 L
  • 1996 Buick Park Avenue V6 3.8 L
  • 1993–1996 Chevrolet Lumina/Monte Carlo V6 3.1 L/3.4 L
  • 1997–1999 Chevrolet Lumina/Monte Carlo V6 3.1 L
  • 1997– Chevrolet Malibu V6 3.1 L
  • 1997–1998 Chevrolet Venture V6 3.4 L
  • 1992-1997 Pontiac Bonneville 3800 V6

4T65-E

The 4T65-E was introduced to replace the 4T60-E in 1997. The 4T65-E included a larger 258 mm torque converter and many other changes to improve reliability. It is able to handle vehicles up to 6500 lb (2948 kg) GVWR with up to 280 ft·lbf (380 N·m) of torque. A number of final drive ratios are available, with many distinct models. Starting in mid year 2000 models, all 4T65-E models received an upgraded valve body. Starting in 2003 the internal electronics were changed, and ratcheting sprags for input and 3rd gear were added.

Models:

• M15 — 245 mm (9.6 in) torque converter
• MN3 — 258 mm (10.2 in) torque converter
• MN7 — 258 mm (10.2 in) torque converter and heavy-duty gearbox (see 4T65E-HD)
• MD7 — 245 mm (9.6 in) torque converter (Chinese version)
• M76 — 245 mm (9.6 in) torque converter (with all-wheel drive capability)

Gear ratios:

1	2	3	4	R
2.92	1.56	1.00	0.70	2.38

Applications:

• M15
  • 1997–2003 Chevrolet Lumina/Monte Carlo V6 3.4 L/3.8 L
  • 1999–2003 Chevrolet Venture V6 3.4 L
  • 2000–2003 Chevrolet Impala V6 3.4 L/3.8 L
  • 2000–2001 Chevrolet Lumina/Monte Carlo V6 3.1 L
• 3.29:1 M15
  • Buick Terraza
  • Chevrolet Uplander
  • Pontiac Montana SV6
  • Saturn Relay
• 3.29:1 M76
  • Buick Rendezvous
  • Pontiac Aztek
  • Oldsmobile Silhouette
• 2.86:1 or 3.05:1 M15
  • Buick LeSabre
  • Chevrolet Impala LA1
  • Chevrolet Monte Carlo LA1
  • Pontiac Grand Prix
• 3.07:1 M15
  • Buick Regal LS/LSE
• 2.92:1 M15
  • Buick LaCrosse
  • Pontiac Bonneville
• 3.69:1 M76
  • Buick Terraza
  • Buick Rendezvous
  • Chevrolet Uplander
  • Pontiac Aztek
  • Pontiac Montana SV6
  • Saturn Relay

4T65E-HD

The 4T65E-HD (code MN7) is a heavy duty version of the 4T65-E used with V8 engines like the LS4 V8 and L67/L32 supercharged V6.

Applications:

• 2.93:1 MN7
  • Chevrolet Impala L37
  • Chevrolet Monte Carlo L37
  • Pontiac Grand Prix GTP
  • Buick Park Avenue
  • Buick Regal GS
• 3.05:1 MN7
  • Buick Park Avenue Ultra
• 3.06:1 MN7
  • Chevrolet Impala SS
  • Chevrolet Monte Carlo SS
• 3.29:1 MN7
  • Buick Regal GSX (SLP)
  • Pontiac Grand Prix GTP Comp G
  • Pontiac Grand Prix GXP

See also

• List of GM transmissions