Powertrain

Description and Operation - F Clutch

~2min read

Overview

Item Description
1 SSF
2 F Clutch Control Valve
3 F Clutch Lock Valve
4 F Clutch Apply Circuit
5 F Clutch Piston
6 Clutch F Assembly
7 Ring gear No. 4
8 Planetary carrier No. 1

Ring gear No. 4 is mechanically connected to the planetary carrier No. 1 and connected to clutch F. When clutch F is applied, ring gear No. 4 can be connected to ring gear No. 2 through clutch C. Ring gear No. 4 can also be connected to the planetary carrier No. 3 through clutch D.

Clutch F Disassembled

Item Description
1 Planetary carrier No. 1
2 CDF clutch cylinder
3 F Clutch Piston
4 Clutch F piston return spring
5 Clutch F balance dam
6 Clutch F apply ring
7 Clutch F friction plates
8 Clutch F steel plates
9 Clutch F pressure plate
10 Cylinder (clutch and planetary gear)
11 Ring gear No. 4

Clutch F Hydraulic Circuits

Item Description
1 Line Pressure
2 Pump Output
3 F Clutch Control Valve
4 SSF
5 Control Pressure for Lock-Up Valve
6 F Clutch Lock Valve
7 Apply pressure to clutch F mechanically
8 Clutch F mechanical
9 Increased Exhaust Pressure
10 Clutch Exhaust

Clutch F Hydraulic Actuation

Line pressure is supplied to the clutch F control valve and the clutch F check valve. When SSF is energized, it moves the regulator valve, allowing regulated line pressure to flow to the clutch F check valve and then to clutch F. When the regulated line pressure in the clutch F control circuit reaches approximately 689 kPa (100 psi), clutch F is fully applied. Pressure in the clutch F control circuit moves the clutch F latch valve to the left, which allows line pressure to hold clutch F applied.

Clutch F Hydraulic Passages




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