Quote:
Originally posted by Aredubjay
Well, probably because there are SIX.  As shown in the diagram there are three shift solenoids and three duty solenoids.
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Okay, so as not to be TOO much of a smarta$$ (ha, as if that's gonna happen
)
Shift Solenoids 1, 2 and 3 are mounted to the control valve. According to the manual, "These solenoids are turned on or off occording to signals sent from the TCU. The gear positions are changed according to the on and off condition of these solenoids." Shift Solenoid 3 is "turned on or off according to the signal sent from the TCU. This operation controls the engagement and disengagement of the overrunning clutch."
Duty Solenoid A is also mounted to the control valve and controls line pressure (Thus the full line pressure from the "resistor mod" which disables duty solenoid A).
Duty Solenoid B is mounted to the control valve also and controls Lock up. It controls the lock up control valve which provides "smooth engagement" of the lock-up clutch.
Duty Solenoid C is mounted on the inside of the extension case. Its signal from the TCU "controls the transfer control valve for controlling the transfer clutch hydraulic oil pressure."
So, there's my "Reader's Digest" version of the manual's explanation of the SIX solenoids (3 Shift, 3 Duty).