Ford Explorer Quiz
Powertrain

Description and Operation - Clutch B

In this manual: Powertrain
General Information — 41Chassis — 173Powertrain — 250Electrical — 303Body and Paint — 331
~2min read

Overview

Item Description
1 SSB
2 Clutch B Control Valve
3 Clutch B Lock-Up Valve
4 Clutch B Apply Circuit
5 Clutch B Piston
6 Clutch B Assembly
7 One-Way Clutch (OWC)
8 Sun gear No. 1
9 Sun gear No. 2

Sun Gear No. 1 is mechanically connected to Sun Gear No. 2. Sun Gear No. 1 is also connected to Clutch B. When Clutch B is applied, it holds Sun Gear No. 1 and Sun Gear No. 2 stationary. The One-Way Clutch (OWC) also holds Sun Gear No. 1 and Sun Gear No. 2 stationary during acceleration in first and second gear when the shift lever is in the D position.

Clutch B Disassembled

Item Description
1 Front Support Assembly
2 Clutch B Piston
3 Clutch B Apply Plate
4 Clutch B Friction Plates
5 Clutch B Separator Springs
6 Clutch B Steel Plates
7 Clutch B Pressure Plate
8 One-Way Clutch (OWC)
9 Sun gear No. 1
10 Sun gear No. 2

Clutch B Hydraulic Circuits

Item Description
1 Line Pressure
2 Pump Output
3 Clutch B Control Valve
4 SSB
5 Control Pressure for Lock-Up Valve
6 Clutch B Lock-Up Valve
7 Apply Pressure to Mechanical Clutch B
8 Mechanical Clutch B
9 Increased Exhaust Pressure
10 Clutch Exhaust

Clutch B Hydraulic Operation

Line pressure is supplied to the B clutch control valve and the B clutch shut-off valve. When the SSB is energized, it moves the regulator valve, allowing regulated line pressure to flow to the B clutch shut-off valve and then to the B mechanical clutch. When the regulated line pressure in the B clutch control circuit reaches approximately 689 kPa (100 psi), the B mechanical clutch is fully applied. The pressure in the B clutch control circuit moves the B clutch lock valve to the left, allowing line pressure to hold the B mechanical clutch engaged.

B Clutch Hydraulic Circuits



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