Low and Reverse Brake
Low and Reverse BrakeREMOVAL
1) Remove the transmission assembly from the vehicle.
2) Extract the torque converter clutch assembly.
3) Remove the input shaft.
4) Disconnect the air breather hose.
5) Lift-up lever behind the transmission harness connector and disconnect it from stay.
6) Disconnect inhibitor switch connector from stay.
7) Remove the oil charger pipe.
8) Remove the oil cooler inlet and outlet pipes.
9) Separate torque converter clutch case and transmission case.
10) Separate transmission case and extension case sections.
11) Remove the reduction drive gear.
12) Remove the center differential carrier. (VTD model)
13) Remove the reduction driven gear.
14) Remove the oil pump housing.
15) Remove control valve assembly.
16) Take out the high clutch and reverse clutch assembly.
17) Take out the thrust needle bearing, planetary gear assembly.
18) Take out 2-4 brake return spring, piston and piston retainer.
19) Remove one-way clutch inner race.
20) Take out the low & reverse piston by applying compressed air.
21) Take out the spring retainer, return spring and low & reverse piston.
INSTALLATION
1) Install the low and reverse piston without tilting.
NOTE: Be careful not to damage the lip seal.
2)Install return spring.
3) Install spring retainer.
4) Install the one-way clutch inner race.
5) Install thrust needle bearing.
NOTE: Place transmission case with the front facing up.
6) Installation of the low & reverse brake: Install dish plate, driven plates, drive plates, and a retaining plate, and secure with a snap ring.
NOTE: Pay attention to the orientation of the dish plate.
7) Apply compressed air intermittently to check for operation.
8) Check the clearance and select retaining plate.
9) Install 2-4 brake piston, retainer and return spring to transmission case.
10) Install planetary gear and low clutch assembly to transmission case.
Install carefully while rotating the low clutch and planetary gear assembly slowly paying special attention not to damage the seal ring.
11) Install the high clutch assembly.
12) Install the oil pump housing assembly.
13) Install the control assembly and oil pan.
14) Install the torque converter clutch case assembly to the transmission case assembly.
15) Install reduction driven gear.
16) Install reduction drive gear. (MPT model)
17) Install the center differential carrier. (VTD model)
18) Install the extension case and rear vehicle speed sensor to the transmission case.
19) Insert inhibitor switch and transmission connector into stay.
20) Install air breather hose.
21) Install the oil cooler pipes.
22) Install the oil charger pipe with O-ring.
23) Insert the input shaft while turning lightly by hand. At this time, not to damage the bushing.
Normal protrusion A: 50 - 55 mm (1.97 - 2.17 inch)
24) Install the torque converter clutch assembly.
25) Install the transmission assembly to the vehicle.
INSPECTION
Check for the following.
^ Drive plate facing for wear or damage
^ Snap ring for wear and spring retainer for deformation
1) Place the same thickness of shim on both sides to prevent retaining plate from tilting.
2) Inspect clearance and select retaining plate.
Standard: 0.7 - 1.2 mm (0.028 - 0.047 inch)
Service limit: 2.2 mm (0.087 inch)