GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Monte Carlo 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Fluid Passages
Figure 1:

Scavenge Pump Body Fluid Passages (Scavenge Pump Cover Side)
Object Number: 186642 Size: MF
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(2)Right Scavenge Suction
(3)Scavenge Outlet
(3)Scavenge Outlet
(3)Scavenge Outlet
(3)Scavenge Outlet
(56)Void
(56)Void
Figure 2:

Scavenge Pump Cover Fluid Passages (Scavenge Pump Body Side)
Object Number: 20638 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(3)Scavenge Outlet
(56)Void
Figure 3:

Scavenge Pump Cover Fluid Passages (Primary Pump Body Side)
Object Number: 20637 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(2)Right Scavenge Suction
(3)Scavenge Outlet
(3)Scavenge Outlet
(3)Scavenge Outlet
(4)Main Pump Suction
(5)Sump
(5)Sump
(6)Line
(6)Line
(56)Void
(56)Void
(56)Void
Figure 4:

Primary Pump Body Fluid Passages (Scavenge Pump Cover Side)
Object Number: 20636 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(3)Scavenge Outlet
(4)Main Pump Suction
(5)Sump
(6)Line
(56)Void
Figure 5:

Primary Pump Body Fluid Passages (Secondary Pump Body Side)
Object Number: 20634 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(3)Scavenge Outlet
(4)Main Pump Suction
(5)Sump
(6)Line
(7)Secondary line
(56)Void
Figure 6:

Secondary Pump Body Fluid Passages (Primary Pump Body Side)
Object Number: 25403 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(3)Scavenge Outlet
(4)Main Pump Suction
(6)Line
(7)Secondary Line
(56)Void
(216)Secondary Pump Cut-Off Ball
Figure 7:

Secondary Pump Body Fluid Passages (Case Cover Side)
Object Number: 25397 Size: LF
(216)Secondary Pump Cut-Off Ball
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(4)Main Pump Suction
(6)Line
(7)Secondary Line
(8)Converter Feed
(9)Lube 2
(11)Converter Release
(22)Torque Signal
(32)Reverse
(40)3rd Clutch
(56)Void
Figure 8:

Gasket Fluid Passages (Secondary Pump Body to Spacer Plate)
Object Number: 186643 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(4)Main Pump Suction
(4)Main Pump Suction
(6)Line
(6)Line
(6)Line
(8)Converter Feed
(8)Converter Feed
(8)Converter Feed
(9)Lube 2
(11)Converter Release
(11)Converter Release
(11)Converter Release
(22)Torque Signal
(22)Torque Signal
(22)Torque Signal
(32)Reverse
(40)3rd Clutch
(40)3rd Clutch
(56)Void
(56)Void
(56)Void
(56)Void
(56)Void
(56)Void
(56)Void
(56)Void
(56)Void
(56)Void
Figure 9:

Upper Control Valve Body Fluid Passages (Case Cover Side)
Object Number: 25420 Size: MF
(6)Line
(8)Converter Feed
(10)TCC Feed Limit
(10)TCC Feed Limit
(10)TCC Feed Limit
(11)Converter Release
(12)Converter Apply
(13)TCC Exhaust Enable
(15)To Cooler
(20)Actuator Feed
(20)Actuator Feed
(21)Filtered Actuator Feed
(22)Torque Signal
(22)Torque Signal
(27)Primary Accumulator
(27)Primary Accumulator
(30)Secondary 2-3 Accumulator
(31)2-3 Accumulator
(31)2-3 Accumulator
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(41)Filtered 3rd Clutch
(41)Filtered 3rd Clutch
(45)Regulated Apply
(45)Regulated Apply
(45)Regulated Apply
(46)TCC Control
(46)TCC Control
(52)Exhaust
(52)Exhaust
(56)Void
(56)Void
(56)Void
Figure 10:

Gasket Fluid Passages (Upper Control Valve Body to Spacer Plate)
Object Number: 25406 Size: MF
(6)Line
(8)Converter Feed
(10)TCC Feed Limit
(11)Converter Release
(12)Converter Apply
(13)TCC Exhaust Enable
(14)Orifice TCC Exhaust Enable
(15)To Cooler
(20)Actuator Feed
(22)Torque Signal
(27)Primary Accumulator
(29)1-2 Accumulator
(30)Secondary 2-3 Accumulator
(31)2-3 Accumulator
(40)3rd Clutch
(41)Filtered 3rd Clutch
(42)Orificed 3rd Clutch
(45)Regulated Apply
(46)TCC Control
Figure 11:

Spacer Plate Fluid Passages (Secondary Pump Body and Upper Control Valve Body to Case Cover)
Object Number: 25404 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(4)Main Pump Suction
(4)Main Pump Suction
(9)Lube 2
(10)TCC Feed Limit
(11)Converter Release
(12)Converter Apply
(13)TCC Exhaust Enable
(14)Orifice TCC Exhaust Enable
(15)To Cooler
(27)Primary Accumulator
(30)Secondary 2-3 Accumulator
(31)2-3 Accumulator
(31)2-3 Accumulator
(32)Reverse
(41)Filtered 3rd Clutch
(42)Orificed 3rd Clutch
(45)Regulated Apply
(46)TCC Control
Figure 12:

Gasket Fluid Passages (Spacer Plate to Case Cover)
Object Number: 791120 Size: MF
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(4)Main Pump Suction
(4)Main Pump Suction
(6)Line
(6)Line
(6)Line
(6)Line
(6)Line
(6)Line
(6)Line
(6)Line
(6)Line
(6)Line
(8)Converter Feed
(8)Converter Feed
(8)Converter Feed
(8)Converter Feed
(8)Converter Feed
(8)Converter Feed
(9)Lube 2
(9)Lube 2
(10)TCC Feed Limit
(10)TCC Feed Limit
(10)TCC Feed Limit
(11)Converter Release
(11)Converter Release
(11)Converter Release
(11)Converter Release
(12)Converter Apply
(13)TCC Exhaust Enable
(13)TCC Exhaust Enable
(13)TCC Exhaust Enable
(15)To Cooler
(20)Actuator Feed
(20)Actuator Feed
(22)Torque Signal
(22)Torque Signal
(22)Torque Signal
(22)Torque Signal
(22)Torque Signal
(22)Torque Signal
(27)Primary Accumulator
(27)Primary Accumulator
(30)Secondary 2-3 Accumulator
(30)Secondary 2-3 Accumulator
(30)Secondary 2-3 Accumulator
(30)Secondary 2-3 Accumulator
(31)2-3 Accumulator
(31)2-3 Accumulator
(32)Reverse
(32)Reverse
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(41)Filtered 3rd Clutch
(41)Filtered 3rd Clutch
(42)Orificed 3rd Clutch
(42)Orificed 3rd Clutch
(45)Regulated Apply
(45)Regulated Apply
(45)Regulated Apply
(45)Regulated Apply
(45)Regulated Apply
(46)TCC Control
(46)TCC Control
(46)TCC Control
Figure 13:

Case Cover Fluid Passages (Secondary Pump Body and Upper Control Valve Body Side)
Object Number: 25409 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(4)Main Pump Suction
(5)Sump
(5)Sump
(8)Converter Feed
(9)Lube 2
(10)TCC Feed Limit
(11)Converter Release
(11)Converter Release
(12)Converter Apply
(13)TCC Exhaust Enable
(15)To Cooler
(20)Actuator Feed
(22)Torque Signal
(30)Secondary 2-3 Accumulator
(32)Reverse
(40)3rd Clutch
(41)Filtered 3rd Clutch
(42)Orificed 3rd Clutch
(45)Regulated Apply
(46)TCC Control
(55)Overflow
(56)Void
(56)Void
(56)Void
Figure 14:

Case Cover Fluid Passages (Case Side)
Object Number: 25411 Size: MF
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(2)Right Scavenge Suction
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(6)Line
(9)Lube 2
(9)Lube 2
(15)To Cooler
(20)Actuator Feed
(20)Actuator Feed
(27)Primary Accumulator
(27)Primary Accumulator
(32)Reverse
(32)Reverse
(33)Reverse Clutch
(39)2nd Clutch
(40)3rd Clutch
(42)Orificed 3rd Clutch
(54)Drain
(55)Overflow
Figure 15:

Seal Fluid Passages (Case Cover to Case and Driven Sprocket Support)
Object Number: 762305 Size: MF
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(2)Right Scavenge Suction
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(6)Line
(6)Line
(6)Line
(6)Line
(9)Lube 2
(20)Actuator Feed
(20)Actuator Feed
(20)Actuator Feed
(27)Primary Accumulator
(27)Primary Accumulator
(27)Primary Accumulator
(32)Reverse
(32)Reverse
(32)Reverse
(33)Reverse Clutch
(33)Reverse Clutch
(39)2nd Clutch
(39)2nd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(42)Orificed 3rd Clutch
(43)4th Band Feed
(54)Drain
(55)Void
Figure 16:

Case and Driven Sprocket Support Fluid Passages (Case Cover Side)
Object Number: 762308 Size: MF
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(5)Sump
(6)Line
(6)Line
(6)Line
(9)Lube 2
(9)Lube 2
(16)Lube
(20)Actuator Feed
(20)Actuator Feed
(20)Actuator Feed
(27)Primary Accumulator
(27)Primary Accumulator
(27)Primary Accumulator
(32)Reverse
(32)Reverse
(33)Reverse Clutch
(33)Reverse Clutch
(39)2nd Clutch
(39)2nd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(40)3rd Clutch
(42)Orificed 3rd Clutch
(52)Exhaust
(54)Drain
(55)Overflow
(56)Void
Figure 17:

Case Fluid Passages (Case Extension Side)
Object Number: 25426 Size: LF
(2)Right Scavenge Suction
Figure 18:

Case Fluid Passages (Lower Channel Plate Side)
Object Number: 25424 Size: MF
(1)Left Scavenge Suction
(2)Right Scavenge Suction
(6)Line
(20)Actuator Feed
(27)Primary Accumulator
(32)Reverse
(33)Reverse Clutch
(38)Forward Clutch
(39)2nd Clutch
(40)3rd Clutch
(44)4th Band
(49)Coast Clutch
(56)Void
Figure 19:

Transfer Plate Fluid Passages (Case Bottom Side)
Object Number: 186646 Size: MF
(32)Reverse
(32)Reverse
(40)3rd Clutch
(56)Void
(56)Void
(56)Void
Figure 20:

Lower Channel Plate Fluid Passages (Case Bottom Side)
Object Number: 25427 Size: MF
(6)Line
(17)PRN
(20)Actuator Feed
(21)Filtered Actuator Feed
(23)Solenoid A
(24)Solenoid B
(26)Reverse Band
(27)Primary Accumulator
(28)3-4 Accumulator
(29)1-2 Accumulator
(32)Reverse
(33)Reverse Clutch
(34)Drive
(35)Low Feed
(36)Low
(37)Low and Reverse Band Reduce
(38)Forward Clutch
(39)2nd Clutch
(40)3rd Clutch
(43)4th Band Feed
(44)4th Band
(47)D321
(48)Coast Clutch Feed
(49)Coast Clutch
(50)D21
(51)D21Y
(53)Orificed Exhaust
(56)Void
Figure 21:

Spacer Plate and Gasket Assembly Fluid Passages (Lower Control Valve Body to Channel Plate)
Object Number: 25423 Size: LF
(1)Metered Orifice
(6)Line
(17)PRN
(17)PRN
(20)Actuator Feed
(21)Filtered Actuator Feed
(23)Solenoid A
(24)Solenoid B
(26)Reverse Band
(32)Reverse
(34)Drive
(35)Low Feed
(36)Low
(38)Forward Clutch
(39)2nd Clutch
(39)2nd Clutch
(40)3rd Clutch
(43)4th Band Feed
(44)4th Band
(47)D321
(48)Coast Clutch Feed
(49)Coast Clutch
(50)D21
(51)D21Y
(52)Exhaust
(53)Orificed Exhaust
Figure 22:

Lower Control Valve Body Fluid Passages (Lower Channel Plate Side)
Object Number: 587886 Size: MF
(6)Line
(17)PRN
(18)PRND4
(19)PRND43
(20)Actuator Feed
(21)Filtered Actuator
(23)Solenoid A
(24)Solenoid B
(25)Low and Reverse Band Apply
(26)Reverse Band
(32)Reverse
(34)Drive
(35)Low Feed
(36)Low
(37)Low and Reverse Band Reduce
(38)Forward Clutch
(39)2nd Clutch
(40)3rd Clutch
(43)4th Band Feed
(44)4th Band
(47)D321
(48)Coast Clutch Feed
(49)Coast Clutch
(50)D21
(51)D21Y
(52)Exhaust
(56)Void
Figure 23:

Accumulator Housing Fluid Passages (Lower Channel Plate Side)
Object Number: 25425 Size: LF
(27)Primary Accumulator
(28)3-4 Accumulator
(29)1-2 Accumulator
(33)Reverse Clutch
(38)Forward Clutch
(44)4th Band
(56)Void