GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Cobalt 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T45-E 🢒 Fluid Passages
Figure 1:

Oil Pump Base Fluid Passages - Control Valve Body Side
Object Number: 20907 Size: MH
(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
Object Number: 1205871 Size: LF
(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
(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
Object Number: 1776871 Size: LF
(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
(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
(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:

Spacer Plate with Bonded Gaskets -  With Electronic Range Select Mode
Object Number: 1206296 Size: LF
(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
(6)Release
(6)Release
(6)Release
(7)Apply
(8)Cooler
(10)Lube 2
(10)Lube 2
(10)Lube 2
(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
(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
(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
(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
(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
(37)Direct Clutch
(38)4th Band
(38)4th Band
(39)D321
(39)D321
(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
(46)Orificed Exhaust
(47)Void
(47)Void
(47)Void
Figure 5:

Channel Plate Fluid Passages - Control Valve Body Side
Object Number: 1776877 Size: LF
(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
(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 6:

Channel Plate Fluid Passages - Case Side
Object Number: 1205879 Size: MF
(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 7:

Channel Plate to Case Gasket
Object Number: 1205880 Size: MF
(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 8:

Case and Driven Sprocket Support Fluid Passages - Channel Plate Side
Object Number: 1205881 Size: LF
(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 9:

Case Fluid Passages - Bottom
Object Number: 20897 Size: LF
(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