the e stands for northeast corridor in 4l60e.
the e stands for northeast corridor in 4l60e.
what does the e stand for in 4l60e?
northeast corridor
in 1990, the turbo hydra-matic 700r4 was renamed the 4l60. under the new designation, the "4" stands for the number of forward gears, the "l" for longitudinal applications (rear-wheel-drive), and the "60" is the strength rating (less than the 4l80). "60" is the relative torque value. for example, 80 is stronger than 60, which is stronger than 40, etc. a 4l80-e can handle more torque than a 4l60-e. the "e" denotes electronically controlled shifting. the 4l60 however is hydraulically shifted based on governor pressure and throttle valve (tv) cable position. 1992 was the last year of widespread usage of the 700r4 (4l60). the 1993 camaro, corvette and typhoon were equipped with the last production 700r4. the last design change of the 700r4 was an added checkball to the valve body. in 1992 electronic controls were added, and it became the 4l60-e. the 4l60e is not easily swapped with the 4l60, as the 4l60e depends on an ecu to shift. the 4l60e went into service in trucks, vans, and suvs in 1993 and in all rwd passenger cars (corvette, f and b/d bodies) in 1994. in 2001, an updated version — the 4l65-e, was introduced. five-pinion planetaries, along with a strength-improved output shaft, were improved to withstand the 300+ lb·ft (400+ n·m) of torque of the 6.0 vortec engine.
turbo-hydramatic
in 1995, the 4l60e received a pwm-controlled lockup converter. the early designs simple on or off lockup function while the later design can variably lock as to not feel the lock up occur. gm added a 5th solenoid to the valve body, called the pwm solenoid. in 1996, gm introduced a redesigned 4l60e transmission case that incorporated a bolt-on bell (2 piece case, bell and case) housing and a 6 bolt tail housing. this 2 piece case style was first seen in 1996 and up model s-10 blazer, s-10 truck, gmc jimmy, and gmc sonoma with the 4.3l engine. in the large majority of 1998 & later applications of the 4l60e were 2 piece cases (i.e., a removable bell housing). both transmissions are the same internally. the non-pwm (1993-1994) style 4l60es are not interchangeable with pwm-style (1995 and later) 4l60es. also in 1996, gm changed the 3-2 solenoid to a different style which makes it not interchangeable with any previous models. for the model year 1996 gm trucks, there were 2 versions of the 4l60e transmissions. one had a bolt on bell housing the other did not. the bolt on bellhousings used on the 4.3l and 1996-2002 gen i+ versions of the small block chevrolet used the same bellhousing while the lsx engines used a longer bellhousing to accommodate a redesigned torque converter with a longer pilot nose (gm sells an adapter assembly for using the lsx 4l60-es when used with an early engine).
turbo-hydramatic