Lincoln Navigator: Automatic Transmission - 10-Speed Automatic Transmission – 10R80 / B Clutch. Description and Operation

Lincoln Navigator 2018-2026 Workshop Manual / Automatic Transmission / Automatic Transmission - 10-Speed Automatic Transmission – 10R80 / B Clutch. Description and Operation

Overview

Item	Description
1	SSB
2	B clutch control valve
3	B clutch latch valve
4	B clutch apply circuit
5	B clutch piston
6	B clutch 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 the B clutch. When the B clutch applies, it holds the sun gear No. 1 and sun gear No. 2 stationary. The One Way Clutch (OWC) also holds the sun gear No. 1 and sun gear No. 2 stationary during acceleration in first and second gear when the shifter is in the D position.

B Clutch Exploded View

Item	Description
1	Front support assembly
2	B clutch piston
3	B clutch apply plate
4	B clutch friction plates
5	B clutch separating springs
6	B clutch steel plates
7	B clutch pressure plate
8	One-Way Clutch (OWC)
9	Sun gear No. 1
10	Sun gear No. 2

B Clutch Hydraulic Circuits

Item	Description
1	Line pressure
2	Pump output
3	B clutch control valve
4	SSB
5	Control pressure to latch valve
6	B clutch latch valve
7	Apply pressure to mechanical B clutch
8	Mechanical B clutch
9	Elevated exhaust pressure
10	Clutch exhaust

B Clutch Hydraulic Operation

Line pressure is supplied to the B clutch control valve and the B clutch latch valve. As SSB turns on, it moves the control valve allowing regulated line pressure to flow to the B clutch latch valve and then to the mechanical B clutch. When the regulated line pressure in the B clutch control circuit reaches approximately 689 kPa (100 psi), the mechanical B clutch is fully applied. The pressure in the B clutch control circuit moves the B clutch latch valve to the left which allows line pressure to hold the mechanical B clutch applied.

B Clutch Hydraulic Passages

A Clutch. Description and Operation

Overview Item Description 1 SSA 2 A clutch control valve 3 A clutch latch valve 4 A clutch apply circuit 5 A clutch piston 6 A clutch assembly 7 Ring gear No...

D Clutch. Description and Operation

Overview Item Description 1 SSD 2 D clutch control valve 3 Clutch gain control valve 4 D clutch apply circuit 5 D clutch piston 6 D clutch assembly 7 Planetary carrier ..

Other information:

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Front Driveshaft. Removal and Installation

Special Tool(s) / General Equipment

Crimping Tool

Materials

Name Specification Motorcraft® Premium Long-Life Grease
XG-1-E1 ESA-M1C75-B

Removal

With the vehicle in NEUTRAL, position the vehicle on a hoist.
Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
Remove the bolts and the transmission shield.