Purpose/Function
The high clutch operates in 4GR, 5GR, and 6GR and intermittently operates the rear carrier by drive force from the turbine shaft.
For the high clutch, a centrifugal balance clutch has been adopted to prevent clutch drag and to assure stabilized piston thrust in all engine speed ranges.
Construction
The high clutch consists of the following parts shown in the figure.
The driven plate of the high clutch is engaged with the high clutch drum. The high clutch drum is engaged with the turbine shaft and spline, and when the turbine shaft rotates, the high clutch drum and driven plate rotate as a single unit.
The drive plate of the high clutch is engaged with the high clutch hub. The high clutch hub is engaged with the rear carrier, and the drive plate, high clutch hub, and rear carrier rotate as a single unit.
For the high clutch piston, a compact and highly reliable bonded seal piston has been adopted in which the piston and seal are molded together.
Centrifugal balance clutch
The centrifugal balance clutch is built into the high clutch.
The centrifugal balance chamber is positioned opposing the clutch chamber for the high clutch. In the centrifugal balance chamber, ATF is constantly charged through a specialized hydraulic circuit.
Operation
If hydraulic pressure is applied to the high clutch piston, the drive plate and driven plate are pressure coupled and drive force from the turbine shaft is transmitted to the rear planetary carrier. In addition, drive force is also transmitted to the front internal gear through the rear planetary gear.
Centrifugal balance clutch
When the clutch drum rotates, centrifugal force is applied to the remaining ATF in the clutch chamber to push the piston, but centrifugal force is also applied to the ATF in the centrifugal balance chamber to force the piston to move back. As a result, the opposing forces of the clutch and balance chambers are offset and the piston does not move, preventing clutch drag.
When clutch pressure is applied to the clutch chamber, the piston, which overcomes the opposing centrifugal hydraulic pressure from the balance chamber and the spring force, is pushed in the direction of clutch engagement and the clutch is engaged. At this time, because the centrifugal hydraulic pressure applied to the clutch pressure in the clutch chamber is offset by the centrifugal hydraulic pressure applied to the balance chamber, the effect of piston thrust by the centrifugal force from the clutch drum rotation is eliminated. As a result, stabilized piston force in all engine speed ranges is assured, thus reducing shift shock.
Windshield Washer Nozzle Adjustment
CAUTION:
If the nozzle is adjusted by inserting a stick-like object into the nozzle,
it could deform the injection nozzle and the washer fluid may not spray normally.
When adjusting the nozzle, do not insert objects into the injection nozzle.
1. Insert a tape-wrapped precision fl ...
Drive Belt Removal/Installation
WARNING:
A hot engine can cause severe burns. Turn off the engine and wait until it
is cool before servicing.
NOTE:
Remove/install the drive belt from the underside of the vehicle.
Generator Drive Belt Removal/Installation
CAUTION:
To prevent damage to the dri ...
Antenna Feeder No.1 Inspection
With audio system
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. A-pillar trim (RH).
b. Decoration panel.
c. Audio unit.
3. Disconnect antenna feeder No.2.
4. Verify that the continuity between antenna feeder No.1 terminals is as indicated
in the tabl ...