GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 Fluid Passages
Figure 1:

Pump Body Fluid Passages (Pump Cover Side)
Object Number: 1462846 Size: MF
(1)Suction (intake)
(2)Decrease
(2)Decrease
(3)Line
(3)Line
(3)Line
(4)Converter Feed
(4)Converter Feed
(4)Converter Feed
(5)Release
(7)To Cooler
(8)Lube from Cooler
(11)Torque Signal
(16)Reverse Input
(16)Reverse Input
(29)3-4 Clutch
(37)Overrun Clutch
(43)Exhaust
(43)Exhaust
(43)Exhaust
(43)Exhaust
(45)Vent
(46)Seal Drain
(47)Void
(47)Void
(48)Regulated Apply
Figure 2:

Pump Cover Fluid Passages (Pump Body Side)
Object Number: 338512 Size: MF
(1)Suction (intake)
(1)Suction (intake)
(2)Decrease
(2)Decrease
(2)Decrease
(2)Decrease
(3)Line
(3)Line
(3)Line
(3)Line
(3)Line
(3)Line
(4)Converter Feed
(4)Converter Feed
(4)Converter Feed
(4)Converter Feed
(5)Release
(5)Release
(6)Apply
(7)To Cooler
(8)Lube from Cooler
(8)Lube from Cooler
(11)Torque Signal
(16)Reverse Input
(16)Reverse Input
(16)Reverse Input
(16)Reverse Input
(18)Forward Clutch Feed
(29)3-4 Clutch
(29)3-4 Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(43)Exhaust
(43)Exhaust
(43)Exhaust
(43)Exhaust
(45)Vent
(46)Seal Drain
(47)Void
(47)Void
(47)Void
(48)Regulated Apply
(48)Regulated Apply
(232)Oil Pump Cover Screen
(237)Check Valve Retainer and Ball Assembly
(237)Check Valve Retainer and Ball Assembly
(238)Converter Clutch Signal Orificed Cup Plug
(240)Orificed Cup Plug
Figure 3:

Pump Cover Fluid Passages (Case Side)
Object Number: 1552973 Size: LF
(1)Suction (Intake)
(2)Decrease
(2)Decrease
(3)Line
(3)Line
(3)Line
(5)Release
(7)To Cooler
(8)Lube from Cooler
(8)Lube from Cooler
(11)Torque Signal
(16)Reverse Input (Rev. Clutch
(16)Reverse Input (Rev. Clutch
(16)Reverse Input (Rev. Clutch
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(29)3-4 Clutch
(29)3-4 Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(43)Exhaust
(43)Exhaust
(43)Exhaust
(45)Vent
(46)Seal Drain
(47)Void
(48)Regulated Apply
(232)Oil Pump Cover Screen
(237)Check Valve Retainer and Ball Assembly
(237)Check Valve Retainer and Ball Assembly
(240)Orificed Cup Plug
(240)Orificed Cup Plug
Figure 4:

Case Fluid Passages (Pump Cover Side)
Object Number: 213848 Size: LF
(3)Line
(3)Line
(3)Line
(7)To Cooler
(7)To Cooler
(8)Lube from Cooler
(8)Lube from Cooler
(10)Oil Cooler Pipe Connector
(10)Oil Cooler Pipe Connector
(11)Torque Signal
(11)Torque Signal
(16)Reverse Input
(16)Reverse Input
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(29)3-4 Clutch
(29)3-4 Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(39)Pressure Plug
(45)Vent
(48)Regulated Apply
(48)Regulated Apply
Figure 5:

Case Fluid Passages (Control Valve Body Side)
Object Number: 338530 Size: LF
(#1)Checkball (91)
(#7)3rd Accumulator Retainer and Ball Assembly (40)
(#10)Checkball (42)
(3)Line
(3)Line
(3)Line
(3)Line
(3)Line
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(10)Filtered Actuator Feed
(11)Torque Signal
(11)Torque Signal
(11)Torque Signal
(11)Torque Signal
(11)Torque Signal
(12)PR
(12)PR
(12)PR
(12)PR
(12)PR
(13)D4-3-2
(13)D4-3-2
(14)Lo/Reverse
(14)Lo/Reverse
(14)Lo/Reverse
(15)Reverse
(16)Reverse Input (Rev. Clutch
(16)Reverse Input (Rev. Clutch
(16)Reverse Input (Rev. Clutch
(16)Reverse Input (Rev. Clutch
(17)D4
(17)D4
(17)D4
(17)D4
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(19)Rear Lube
(20)Accumulator
(21)Orificed Accumulator
(22)Signal A
(22)Signal A
(22)Signal A
(24)2nd
(24)2nd
(24)2nd
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(26)C.C. Signal
(26)C.C. Signal
(27)3-4 Signal
(27)3-4 Signal
(28)3rd Accumulator
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(30)4th Signal
(31)Servo Feed
(32)4th
(32)4th
(33)3-4 Accumulator
(33)3-4 Accumulator
(33)3-4 Accumulator
(33)3-4 Accumulator
(33)3-4 Accumulator
(34)D3
(34)D3
(34)D3
(34)D3
(34)D3
(35)Overrun
(35)Overrun
(36)Overrun Clutch Feed
(36)Overrun Clutch Feed
(37)Overrun Clutch
(37)Overrun Clutch
(37)Overrun Clutch
(38)D2
(38)D2
(38)D2
(38)D2
(39)Orificed D2
(41)Lo
(41)Lo
(41)Lo
(42)Lo/1st
(42)Lo/1st
(43)Exhaust
(43)Exhaust
(44)Orificed Exhaust
(44)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
(48)Regulated Apply
(48)Regulated Apply
Figure 6:

Spacer Plate Fluid Passages
Object Number: 1365436 Size: LF
(3)Line
(3)Line
(3)Line
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9/10)Actuator Feed Limit/Filtered Actuator Feed
(9/10)Actuator Feed Limit/Filtered Actuator Feed
(10)Filtered Actuator Feed
(10)Filtered Actuator Feed
(10/22)Filtered Actuator Feed/Signal A
(10/23)Filtered Actuator Feed/Signal B
(11)Torque Signal
(11)Torque Signal
(11)Torque Signal
(12)PR
(12)PR
(12)PR
(12)PR
(12)PR
(13)D4-3-2
(13)D4-3-2
(14)Lo/Reverse
(14)Lo/Reverse
(14)Lo/Reverse
(15)Reverse
(15)Reverse
(15/16)Reverse/Reverse Input (Rev. Clutch
(15/16)Reverse/Reverse Input (Rev. Clutch
(16)Reverse Input (Rev. Clutch
(17)D4
(17)D4
(17)D4
(17)D4
(17)D4
(17/18)D4
(17/18)D4
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(20)Accumulator
(20)Accumulator
(20)Accumulator
(20/21)Accumulator/Orificed Accumulator
(20/21)Accumulator/Orificed Accumulator
(21)Orificed Accumulator
(22)Signal A
(22)Signal A
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24/25)2nd/2nd Clutch
(24/25)2nd/2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(26)C.C. Signal
(26)C.C. Signal
(27)3-4 Signal
(27)3-4 Signal
(27/29)3-4 Signal
(27/29)3-4 Signal
(28)3rd Accumulator
(29/28)3-4 Clutch/3rd Accumulator
(29/28)3-4 Clutch/3rd Accumulator
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(30)4th Signal
(30)4th Signal
(31)Servo Feed
(31)Servo Feed
(31)Servo Feed
(32)4th
(33)3-4 Accumulator
(33)3-4 Accumulator
(33)3-4 Accumulator
(34a)D3 - Blocked on M33 Models
(34a)D3 - Blocked on M33 Models
(34)D3
(34)D3
(34)D3
(34)D3
(34)D3
(34)D3
(35a)Overrun- Blocked on M33 Models
(35a)Overrun- Blocked on M33 Models
(35)Overrun
(35/36)Overrun/Overrun Clutch Feed
(35/36)Overrun/Overrun Clutch Feed
(35/39)Overrun/Orificed D2
(36)Overrun Clutch Feed
(37)Overrun Clutch
(38a)D2 - M33 Models Only
(38a)D2 - M33 Models Only
(38)D2
(38)D2
(38)D2
(38)D2
(38)D2
(38)D2
(38/39)D2/Orificed D2
(41)Lo
(41)Lo
(41)Lo
(41)Lo
(42)Lo/1st
(42)Lo/1st
(43)Exhaust
(43/44)Exhaust/Orificed Exhaust
(43/44)Exhaust/Orificed Exhaust
(44)Orificed Exhaust
(47)Void
(48)Regulated Apply
(48)Regulated Apply
(49)Shift Solenoids Screen
(50)Pressure Control Solenoid Screen
Figure 7:

Control Valve Body Fluid Passages (Case Side)
Object Number: 1364046 Size: LF
(#2)Checkball (61)
(#3)Checkball (61)
(#4)Checkball (61)
(#5)Checkball (61)
(#6)Checkball (61)
(#8)Checkball (61)
(#12)Checkball (61)
(3)Line
(3)Line
(3)Line
(3)Line
(3)Line
(3)Line
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(9)Actuator Feed Limit
(10)Filtered Actuator Feed
(10)Filtered Actuator Feed
(11)Torque Signal
(11)Torque Signal
(11)Torque Signal
(11)Torque Signal
(12)PR
(12)PR
(12)PR
(13)D4-3-2
(13)D4-3-2
(14)Lo/Reverse
(14)Lo/Reverse
(15)Reverse
(15)Reverse
(15)Reverse
(16)Reverse Input (Rev. Clutch)
(17)D4
(17)D4
(17)D4
(17)D4
(17)D4
(17)D4
(17)D4
(18)Forward Clutch Feed
(18)Forward Clutch Feed
(20)Accumulator
(20)Accumulator
(22)Signal A
(22)Signal A
(23)Signal B
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(24)2nd
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(26)C.C. Signal
(26)C.C. Signal
(27)3-4 Signal
(27)3-4 Signal
(28)3rd Accumulator
(28)3rd Accumulator
(29)3-4 Clutch
(29)3-4 Clutch
(29)3-4 Clutch
(30)4th Signal
(30)4th Signal
(31)Servo Feed
(31)Servo Feed
(31)Servo Feed
(32)4th
(33)3-4 Accumulator
(33)3-4 Accumulator
(34)D3
(34)D3
(34)D3
(34)D3
(34)D3
(35)Overrun
(35)Overrun
(36)Overrun Clutch Feed
(37)Overrun Clutch
(38)D2
(38)D2
(38)D2
(40)3-2 Signal
(41)Lo
(41)Lo
(41)Lo
(42)Lo/1st
(42)Lo/1st
(42)Lo/1st
(43)Exhaust
(43)Exhaust
(43)Exhaust
(43)Exhaust
(43)Exhaust
(43)Exhaust
(43)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
(48)Regulated Apply
(48)Regulated Apply
(399)Ball Check Valve - M33 Models
Figure 8:

2-4 Servo Fluid Passages
Object Number: 10130 Size: LF
(#7)3rd Accumulator Retainer and Ball Assembly (40)
(#7)3rd Accumulator Retainer and Ball Assembly (40)
(11)Case Servo Orificed Plug
(11)Case Servo Orificed Plug
(25)2nd Clutch
(25)2nd Clutch
(25)2nd Clutch
(28)3rd Accumulator
(28)3rd Accumulator
(28)3rd Accumulator
(32)4th
(32)4th
(32)4th
(32)4th
(43)Exhaust
(43)Exhaust
(44)Orificed Exhaust
(44)Orificed Exhaust
Figure 9:

1-2 Accumulator Cover Fluid Passages
Object Number: 829181 Size: MF
(20)Accumulator
(21)Orificed Accumulator
(25)2nd Clutch
(25)2nd Clutch