GM's 4-speed overdrive transmissions brought fuel economy improvements over the older 3-speeds and continue to be the most common automatic transmissions found in GM vehicles from the 1980s through the 2010s.
700R4 / 4L60 (MECHANICAL CONTROLS): Configuration: 4-speed overdrive automatic Overall length: ~30.5" Input shaft: 30-spline Output shaft: 27-spline Weight: ~155 lbs Controls: Mechanical — TV cable required for proper shift control Applications: GM cars and light trucks, 1982–1992 Note: The 700R4 was renamed the 4L60 in 1990. Same transmission, different name.
4L60E (ELECTRONIC CONTROLS): Configuration: 4-speed overdrive automatic Overall length: ~30.5" (same as 700R4) Input shaft: 30-spline Output shaft: 27-spline Weight: ~155 lbs Controls: Electronic — requires PCM/ECM interface Applications: GM cars and light trucks, 1993–2013 Note: Externally very similar to the 700R4/4L60, but requires electronic controls rather than a TV cable.
4L80E: Configuration: 4-speed overdrive automatic (heavy-duty) Overall length: ~26.4" Input shaft: 32-spline Output shaft: 32-spline Weight: ~230 lbs Controls: Electronic Applications: GM HD trucks (2500/3500), vans, 1991–2013 Note: The 4L80E is based on the TH400 platform with overdrive added. Significantly heavier and stronger than the 4L60E.
6L80: Configuration: 6-speed overdrive automatic Overall length: ~24" Weight: ~200 lbs Controls: Electronic Applications: Late-model GM trucks, Camaro SS, and performance vehicles from 2007+
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