Differences Between 4l60 4l65 4l70 6y6u11

Differences between 4L60 4L65 4L70 (4L60 Family Transmissions) The Hydra-Matic 4L60 / 4L65 are differentiated primarily because of gearset design. Each of the two planetary gearsets in these four-speed automatic transmissions have four pinion gears in the 4L60, and five pinion gears in the 4L65 and 4L70. The 4L65 was introduced in the 2001 model year as a heavy duty (HD) variant with more robust parts that provide increased strength. Beginning in 2002, many of the technologies from the 4L65 applications that add durability have been incorporated into the 4L60, such as more robust bushings and bearings. The 4L70 is a variation of the five-pinion 4L65, with additional strengthening in the output shaft and reaction internal gear to handle increased engine torque. External fit form and function are identical between the three variants of 4L60E, 4L65E, and 4L70E transmission assemblies. Most commonly any of these transmissions are referred to as “4L60 family” units. Differences between 4L80E and 4L85E (4L80 Family Transmissions) The Hydra-Matic 4L80 / 4L85E are also externally the same as each other. The differences are internal and relate to hardening of various components. External fit form and function are identical between the two variants of 4L80E and 4L85E transmission assemblies. Most commonly these transmissions are referred to as “4L80 family” units.