Band: Description and Operation

DESCRIPTION
The 2-4 band locks the rear sun gear and drum to the transaxle case. The 2-4 band encircles the rear sun gear and drum and operates during different conditions depending on the engine application; One end of the 2-4 band is secured to the servo band lever, the other end to the 2-4 band servo retainer.

OPERATION
When hydraulic pressure is applied between the servo retainer and the servo piston (2-4 band engagement side), the servo piston overcomes the spring force and acts on the 2-4 band, locking the rear sun gear and drum. When hydraulic pressure is applied between the servo piston and transaxle case (2-4 band disengagement side), the servo piston is pressed toward the servo retainer side. The 2-4 band expands by its own spring force, releasing the rear sun gear and drum.

When hydraulic pressure is applied simultaneously between the servo retainer and the servo piston and between the servo piston and transaxle case, the servo piston is pressed to the servo retainer side as a result of the difference of the surface area between the two, releasing the rear sun gear and drum. The 2-4 band operates during second gear and fourth gear.