Toyota
Dodge Durango
 Service Manual
Transmission and Transfer Case » Description and operation
Bands

DESCRIPTION

KICKDOWN (FRONT) BAND

The kickdown, or "front", band (Fig. 59) holds the common sun gear of the planetary gear sets. The front (kickdown) band is made of steel, and faced on its inner circumference with a friction-type lining.

One end of the band is anchored to the transmission case, and the other is acted on with a pushing force by a servo piston. The front band is a single-wrap design (the band does not completely encompass/ wrap the drum that it holds).

LOW/REVERSE (REAR) BAND

The low/reverse band, or "rear", band (Fig. 60) is similar in appearance and operation to the front band.

OPERATION

KICKDOWN (FRONT) BAND

The kickdown band holds the common sun gear of the planetary gear sets by applying and holding the front clutch retainer, which is splined to the sun gear driving shell, and in turn splined directly to the sun  gear. The application of the band by the servo is typically done by an apply lever and link bar.

Fig. 59 Front Band Fig. 59 Front Band

1 - FRONT BAND

2 - TRANSMISSION HOUSING

Fig. 60 Rear Band Fig. 60 Rear Band

1 - REAR BAND

2 - BAND LINK

LOW/REVERSE (REAR) BAND

The rear band holds the rear planet carrier stationary by being mounted around and applied to the low/reverse drum.

    More about «Description and operation»:

    42/44 Re transmission

    Fluid

    Torque converter

    Oil pump

    Valve body

    Accumulator

    Pistons

    Front clutch

    Rear clutch

    Overdrive clutch

    Overrunning clutch

    Planetary gearset

    Bands

    Servos

    Gearshift mechanism

    Converter drainback valve

    Powertrain control module (pcm)

    Electronic governor

    Governor pressure curves

    Overdrive off switch

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