Operations of Clutches and Brakes

WARNING: This page is about a different variant/trim than selected.

Fig 1: Operations Of Clutches And Brakes

GM1225587

Courtesy of GENERAL MOTORS CORP.

Operations of Clutches and Brakes

Clutch and Brake		Operation
C1	Forward Clutch	Connects the intermediate shaft and the front sun gear.
C2	Direct Clutch	Connects the input shaft and the planetary carrier.
C3	Reverse Clutch	Connects the intermediate shaft and the rear sun gear.
B1	O/D and 2nd Brake	Lock rear sun gear
B2	2nd Brake	Lock rear sun gear
B3	1st and Reverse Brake	Lock planetary carrier
F1	1-Way Clutch No. 1	Lock counterclockwise rotation of the rear sun gear, when B2 operations
F2	1-Way Clutch No. 2	Lock counterclockwise rotation of the planetary carrier

Transmission Range Reference

Position		Solenoid			Clutch			Brake			One-Way Clutch
Position		Shift 1	Shift 2	Timing	C1	C2	C3	B1	B2	B3	F1	F2
P		ON	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF
R	V less than 9 km/h (5 mph)	ON	ON	OFF	OFF	OFF	ON	OFF	OFF	ON	OFF	OFF
R	V greater than or equal to 9 km/h (5 mph)	ON	ON	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF
N		ON	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF
D	1st	ON	ON	OFF	ON	OFF	OFF	OFF	OFF	OFF	OFF	ON
	2nd	ON	OFF	OFF	ON	OFF	OFF	OFF	ON	OFF	ON	OFF
	3rd	OFF	OFF	OFF	ON	ON	OFF	OFF	ON	OFF	OFF	OFF
	3-4	OFF	ON	ON-OFF	ON-OFF	ON	OFF	OFF-ON	ON	OFF	OFF	OFF
	4th	OFF	ON	OFF	OFF	ON	OFF	ON	ON	OFF	OFF	OFF
2	1st	ON	ON	OFF	ON	OFF	OFF	OFF	OFF	OFF	OFF	ON
	2nd	ON	OFF	OFF	ON	OFF	OFF	ON	ON	OFF	ON	OFF
	3rd	OFF	OFF	OFF	ON	ON	OFF	OFF	ON	OFF	OFF	OFF
1	1st	ON	ON	OFF	ON	OFF	OFF	OFF	OFF	ON	OFF	ON
1	2nd	ON	OFF	OFF	ON	OFF	OFF	ON	ON	OFF	ON	OFF