Fluid Passages. Oldsmobile Alero 2002

For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 2002 🢒 Alero 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T40-E/4T45-E 🢒 Fluid Passages

Figure 1:

Oil Pump Base Fluid Passages - Control Valve Body Side


(1)	Suction
(1)	Suction
(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void

Figure 2:

Control Valve Body Fluid Passages (Oil Pump Base Side)


(1)	Suction
(1)	Suction
(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(6)	Release
(13)	PRND4
(25)	Reverse
(28)	Drive
(41)	D21
(44)	Lo
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void

Figure 3:

Control Valve Body Fluid Passages (Channel Plate Side)


(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(3)	Decrease
(4)	Converter Feed
(4)	Converter Feed
(4)	Converter Feed
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(6)	Release
(6)	Release
(6)	Release
(7)	Apply
(8)	Cooler
(8)	Cooler
(10)	Lube 2
(10)	Lube 2
(10)	Lube 2
(10)	Lube 2
(11)	PRN
(12)	Lo/PRN
(12)	Lo/PRN
(13)	PRND4
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(15)	Filtered Actuator Feed
(15)	Filtered Actuator Feed
(16)	1-2 Signal
(16)	1-2 Signal
(16)	1-2 Signal
(17)	2-3 Signal
(17)	2-3 Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(19)	VBS Signal
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(21)	1-2 Accumulator Feed
(22)	3-4 Accumulator
(23)	2-3 Accumulator
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(28)	Drive
(28)	Drive
(28)	Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(31)	Filtered 2-3 Drive
(32)	2nd Clutch
(32)	2nd Clutch
(32)	2nd Clutch
(33)	TCC Signal (PWM)
(33)	TCC Signal (PWM)
(33)	TCC Signal (PWM)
(34)	TCC Regulated Apply
(34)	TCC Regulated Apply
(34)	TCC Regulated Apply
(35)	3-4 Drive
(35)	3-4 Drive
(35)	3-4 Drive
(35)	3-4 Drive
(37)	Direct Clutch
(38)	4th Band
(38)	4th Band
(38)	4th Band
(39)	D321
(39)	D321
(39)	D321
(39)	D321
(40)	Coast Clutch
(40)	Coast Clutch
(40)	Coast Clutch
(41)	D21
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(44)	Lo
(44)	Lo
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(46)	Orificed Exhaust
(46)	Orificed Exhaust
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void

Figure 4:

Control Valve Body to Spacer Plate Gasket


(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(4)	Converter Feed
(4)	Converter Feed
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(6)	Release
(6)	Release
(6)	Release
(7)	Apply
(8)	Cooler
(10)	Lube 2
(10)	Lube 2
(10)	Lube 2
(11)	PRN
(11)	PRN
(12)	Lo/PRN
(13)	PRND4
(13)	PRND4
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(15)	Filtered Actuator Feed
(15)	Filtered Actuator Feed
(16)	1-2 Signal
(17)	2-3 Signal
(17)	2-3 Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(19)	VBS Signal
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(21)	1-2 Accumulator Feed
(21)	1-2 Accumulator Feed
(22)	3-4 Accumulator Feed
(22)	3-4 Accumulator Feed
(23)	2-3 Accumulator
(23)	2-3 Accumulator
(24)	2-3 Accumulator Feed
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(25)	Reverse
(26)	Reverse Clutch
(26)	Reverse Clutch
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(28)	Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(31)	Filtered 2-3 Drive
(32)	2nd Clutch
(32)	2nd Clutch
(32)	2nd Clutch
(33)	TCC Signal (PWM)
(33)	TCC Signal (PWM)
(34)	TCC Regulated Apply
(34)	TCC Regulated Apply
(35)	3-4 Drive
(35)	3-4 Drive
(36)	Direct Clutch Feed
(36)	Direct Clutch Feed
(36)	Direct Clutch Feed
(38)	4th Band
(38)	4th Band
(39)	D321
(39)	D321
(39)	D321
(39)	D321
(40)	Coast Clutch
(41)	D21
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(44)	Lo
(44)	Lo
(44)	Lo
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(47)	Void
(47)	Void
(47)	Void
(47)	Void

Figure 5:

Spacer Plate


(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(4)	Converter Feed
(4)	Converter Feed
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(6)	Release
(6)	Release
(6)	Release
(7)	Apply
(8)	Cooler
(10)	Lube 2
(10)	Lube 2
(10)	Lube 2
(11)	PRN
(12/11)	Lo/PRN/PRN
(12)	Lo/PRN
(12/44)	Lo/PRN/Lo
(13)	PRND4
(13)	PRND4
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(15)	Filtered Actuator Feed
(15/16)	Filtered Actuator Feed/1-2 Signal
(17/15)	2-3 Signal/Filtered Actuator Feed
(17)	2-3 Signal
(17)	2-3 Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20/21)	1-2/3-4 Accumulator/1-2 Accumulator Feed
(20/21)	1-2/3-4 Accumulator/1-2 Accumulator Feed
(20/22)	1-2/3-4 Accumulator/3-4 Accumulator Feed
(20/22)	1-2/3-4 Accumulator/3-4 Accumulator Feed
(21)	1-2 Accumulator Feed
(22)	3-4 Accumulator Feed
(23)	2-3 Accumulator
(23/24)	2-3 Accumulator/2-3 Accumulator Feed
(23/24)	2-3 Accumulator/2-3 Accumulator Feed
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25/26)	Reverse/Reverse Clutch
(26)	Reverse Clutch
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(29/28)	Forward Clutch/Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30/31)	2-3 Drive/Filtered 2-3 Drive
(30/32)	2-3 Drive/2nd Clutch
(30/32)	2-3 Drive/2nd Clutch
(32)	2nd Clutch
(32)	2nd Clutch
(33)	TCC Signal (PWM)
(33)	TCC Signal (PWM)
(34)	TCC Regulated Apply
(34)	TCC Regulated Apply
(35)	3-4 Drive
(35)	3-4 Drive
(35/36)	3-4 Drive/Direct Clutch Feed
(35/36)	3-4 Drive/Direct Clutch Feed
(36)	Direct Clutch Feed
(37/36)	Direct Clutch/Direct Clutch Feed
(37/36)	Direct Clutch/Direct Clutch Feed
(38)	4th Band
(38)	4th Band
(39)	D321
(39)	D321
(39)	D321
(39)	D321
(40)	Coast Clutch
(41)	D21
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(44)	Lo
(44)	Lo
(44)	Lo
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45/46)	Exhaust/Orificed Exhaust
(45/46)	Exhaust/Orificed Exhaust
(47)	Void
(47)	Void
(47)	Void

Figure 6:

Spacer Plate to Channel Plate Gasket


(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(4)	Converter Feed
(4)	Converter Feed
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(6)	Release
(6)	Release
(6)	Release
(7)	Apply
(8)	Cooler
(10)	Lube 2
(10)	Lube 2
(10)	Lube 2
(11)	PRN
(12)	Lo/PRN
(12)	Lo/PRN
(13)	PRND4
(13)	PRND4
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(15)	Filtered Actuator Feed
(15)	Filtered Actuator Feed
(17)	2-3 Signal
(17)	2-3 Signal
(17)	2-3 Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(21)	1-2 Accumulator Feed
(22)	3-4 Accumulator Feed
(23)	2-3 Accumulator
(23)	2-3 Accumulator
(23)	2-3 Accumulator
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(26)	Reverse Clutch
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(29)	Forward Clutch
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(32)	2nd Clutch
(32)	2nd Clutch
(33)	TCC Signal (PWM)
(33)	TCC Signal (PWM)
(34)	TCC Regulated Apply
(34)	TCC Regulated Apply
(35)	3-4 Drive
(35)	3-4 Drive
(35)	3-4 Drive
(36)	Direct Clutch Feed
(37)	Direct Clutch
(38)	4th Band
(38)	4th Band
(39)	D321
(39)	D321
(39)	D321
(39)	D321
(40)	Coast Clutch
(41)	D21
(41)	D21
(42)	Intermediate Band Feed
(42)	Intermediate Band Feed
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(44)	Lo
(44)	Lo
(44)	Lo
(44)	Lo
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(46)	Orificed Exhaust
(46)	Orificed Exhaust
(47)	Void
(47)	Void

Figure 7:

Channel Plate Fluid Passages (Control Valve Body Side)


(1)	Suction
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(2)	Line
(3)	Decrease
(4)	Converter Feed
(4)	Converter Feed
(5)	TCC Feed Limit
(5)	TCC Feed Limit
(6)	Release
(6)	Release
(6)	Release
(7)	Apply
(7)	Apply
(7)	Apply
(7)	Apply
(8)	Cooler
(8)	Cooler
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(10)	Lube 2
(10)	Lube 2
(11)	PRN
(11)	PRN
(11)	PRN
(11)	PRN
(11/45)	PRN/Exhaust
(12)	Lo/PRN
(13)	PRND4
(13)	PRND4
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(14)	Actuator Feed
(17)	2-3 Signal
(17)	2-3 Signal
(18)	Torque Signal
(18)	Torque Signal
(18)	Torque Signal
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(20)	1-2/3-4 Accumulator
(21)	1-2 Accumulator Feed
(22)	3-4 Accumulator Feed
(23)	2-3 Accumulator
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(25)	Reverse
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(28)	Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(30)	2-3 Drive
(32)	2nd Clutch
(32)	2nd Clutch
(32)	2nd Clutch
(32)	2nd Clutch
(33)	TCC Signal (PWM)
(34)	TCC Regulated Apply
(35)	3-4 Drive
(36)	Direct Clutch Feed
(36)	Direct Clutch Feed
(37)	Direct Clutch
(37)	Direct Clutch
(38)	4th Band
(38)	4th Band
(39)	D321
(39)	D321
(39)	D321
(40)	Coast Clutch
(40)	Coast Clutch
(41)	D21
(41)	D21
(42)	Intermediate Band Feed
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(43)	Intermediate Band
(44)	Lo
(44)	Lo
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(46)	Orificed Exhaust
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(47)	Void
(#1)	Ball Check Valve
(#2)	Ball Check Valve
(#3)	Ball Check Valve
(#4)	Ball Check Valve
(#5)	Ball Check Valve
(#6)	Ball Check Valve
(#7)	Ball Check Valve

Figure 8:

Channel Plate Fluid Passages (Case Side)


(1)	Suction
(1)	Suction
(2)	Line
(3)	Decrease
(8)	Cooler
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(10)	Lube 2
(21)	1-2 Accumulator Feed
(22)	3-4 Accumulator Feed
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(27)	Lo Band
(28)	Drive
(32)	2nd Clutch
(32)	2nd Clutch
(36)	Direct Clutch Feed
(37)	Direct Clutch
(38)	4th Band
(38)	4th Band
(40)	Coast Clutch
(43)	Intermediate Band
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(45)	Exhaust
(47)	Void
(47)	Void
(47)	Void

Figure 9:

Channel Plate to Case Gasket


(1)	Suction
(1)	Suction
(2)	Line
(8)	Cooler
(9)	Lube 1
(10)	Lube 2
(10)	Lube 2
(24)	2-3 Accumulator Feed
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(28)	Drive
(32)	2nd Clutch
(38)	4th Band
(38)	4th Band
(38)	4th Band
(43)	Intermediate Band
(43)	Intermediate Band
(45)	Exhaust
(47)	Void
(47)	Void
(47)	Void

Figure 10:

Case and Driven Sprocket Support Fluid Passages (Channel Plate Side)


(1)	Suction
(1)	Suction
(1)	Suction
(2)	Line
(8)	Cooler
(8)	Cooler
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(9)	Lube 1
(10)	Lube 2
(10)	Lube 2
(24)	2-3 Accumulator Feed
(24)	2-3 Accumulator Feed
(25)	Reverse
(25)	Reverse
(26)	Reverse Clutch
(26)	Reverse Clutch
(27)	Lo Band
(27)	Lo Band
(28)	Drive
(28)	Drive
(32)	2nd Clutch
(32)	2nd Clutch
(37)	Direct Clutch
(37)	Direct Clutch
(38)	4th Band
(38)	4th Band
(38)	4th Band
(38)	4th Band
(40)	Coast Clutch
(40)	Coast Clutch
(43)	Intermediate Band
(43)	Intermediate Band
(45)	Exhaust
(47)	Void
(47)	Void
(48)	Oil Level Control
(48)	Oil Level Control

Figure 11:

Case Fluid Passages - Bottom


(1)	Suction
(10)	Lube 2
(10)	Lube 2
(25)	Reverse
(25)	Reverse
(27)	Lo Band
(27)	Lo Band
(29)	Forward Clutch
(29)	Forward Clutch
(38)	4th Band
(43)	Intermediate Band
(47)	Void
(47)	Void
(47)	Void
(48)	Oil Level Control
(48)	Oil Level Control