2 shift solenoids are in a 4l60e transmission.
how many solenoids are in a 4l60e transmission?
2 shift solenoids
the 4l60e is rated to handle up to 360 ft·lbf (488 n·m) of torque. it weighs 133 pounds without transmission fluid.





















































the 4l60e family of transmissions use 2 shift solenoids, initially called shift solenoid a & shift solenoid b, later changed to comply with obd ii (on board diagnostics revision 2) regulations to 1-2 shift solenoid & 2-3 shift solenoid. by activating and deactivating the solenoids in a predetermined pattern by the pcm, 4 distinct gear ratios can be achieved. the shift solenoid pattern, also sometimes referred to as solenoid firing order, is as follows;





















































section::::applications.





















































bullet::::- buick rainier 2004-2007
gm 4l60-e transmission
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).
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