6L80
The 6L80 and similar 6L90 are GM's newest and most revolutionary transmissions. Though not yet ready for full acceptance in conversions like the famous 4L60E, they are steadily rising
- Six forward speeds
- Compatibility with Gen IV GM engines
- An electronically operated transmission that is controlled by the networking of a GM Gen IV ECM and integrated TCM
- Aluminum alloy case with non-integral bellhousing
- Highly durable, geared very well and smooth operating in both street and off-road environments
- Adaptable to most Jeep transfer cases, 1980-present
- Found in some 2007-present GM vehicles
4L60E
The 4L60E (and similar 4L65 & 4L70) presents the culminated engineering greatness of five decades of GM automatic power transmission design and is the dominant conversion transmission of this era
- Compatibility with modern GM engines
- An electronically operated transmission that is controlled by the integrated Powertrain Management Computer
- Aluminum alloy case with non-integral bellhousing
- Very durable, geared well and smooth operating in both street and off-road environments
- Adaptable to essentially all of the Jeep transfer cases
- Found in some 1997-present GM vehicles
4L80E
The 4L80E (and similar 4L85) descended directly from the TH400, and improved on it with overdrive and a lockup torque converter
- Compatibility with modern GM engines
- An electronically operated transmission that is controlled by the integrated Powertrain Management Computer
- Aluminum alloy case with non-integral bellhousing
- Impressively durable, geared well and smooth operating in both street and off-road environments
- Adaptable to most of the Jeep transfer cases from 1980-present
- Found in some 1991-present GM vehicles
700R4 / 4L60
The 700R4 is the great result of what happens when a company like GM doggedly sticks with it. It was released with its share of bugs, but it didn't stay that was for long. It's a top choice in some of the best Jeep upgrades out there
- Compatibile with classic and modern GM engines
- Either hydraulically (700R4 / 4L60) or electronically operated (4L60E) transmission
- Aluminum alloy case with integral bellhousing
- Very durable, geared well and smooth operating in both street and off-road environments
- Adaptable to essentially all of the Jeep transfer cases
- Found in some 1982-1996 GM vehicles
TH350
The TH350 is tough, compact and consistently a very popular choice for a Jeep upgrade transmission
- Compatibile with classic and modern GM engines
- Self-shifting hydraulic control
- Aluminum alloy case with integral bellhousing
- Strong and smooth operating in both street and off-road environments
- Adaptable to essentially all of the Jeep transfer cases
- Found in some 1969-1984 GM vehicles
TH400
The TH400 is the Big Daddy of the GM automatics. Brutally tough, relatively efficient and totally buildable
- Compatibile with classic and modern GM engines, as well as AMC I6 & V8 engines
- Self-shifting hydraulic control
- Aluminum alloy case with integral bellhousing
- Strong and smooth operating in both street and off-road environments
- Adaptable to essentially all of the Jeep transfer cases
- Found in some 1964-1995+ GM vehicles
AW4
The AW4 transmission was a step into the modern era for Jeep, with its overdrive and electronic control
- Compatibile with AMC I6 engines
- Electronic control, via its own computer (when interfaced with an ECM) or an integrated PCM
- Aluminum alloy case with non-integral bellhousing
- Moderate strength
- Found in the 1987-2001 Jeep XJ