GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Tahoe - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 2ML70 🢒 Fluid Passages
Figure 1:

Torque Dampener Housing Assembly
Object Number: 1968916 Size: LF
(2)Line
(4)Decrease
(7)Cooler Feed
(8)Lube
(9)Regulator Lube
(12)PCS Line
(13)Auxiliary Suction
(14)Auxiliary Line
(38)Exhaust
(39)Seal Drainback
(41)Void
(43)Auxiliary Line Boost
Figure 2:

Fluid Pump Cover Assembly - Torque Dampener Housing Assembly Side
Object Number: 1968917 Size: LF
(1)Suction
(2)Line
(4)Decrease
(7)Cooler Feed
(8)Lube
(9)Regulator Lube
(12)PCS Line
(13)Auxiliary Suction
(14)Auxiliary Line
(38)Exhaust
(39)Seal Drainback
(41)Void
(43)Auxiliary Line Boost
Figure 3:

Fluid Pump Cover Assembly - Case Assembly Side
Object Number: 1968918 Size: LF
(1)Suction
(2)Line
(4)Decrease
(9)Regulator Lube
(12)PCS Line
(13)Auxiliary Suction
(14)Auxiliary Line
(38)Exhaust
(39)Seal Drainback
(41)Void
(43)Auxiliary Line Boost
Figure 4:

Case Assembly - Fluid Pump Cover Assembly Side
Object Number: 1968919 Size: LF
(5)A Cooling
(33)4th Clutch
(40)Vent
Figure 5:

Case Assembly - Rear Case Assembly Side
Object Number: 1968920 Size: LF
(6)B Cooling
(18)HL 12 Clutch
(25)13 Clutch
(30)HD 234 Clutch
(40)Vent
Figure 6:

Center Support Assembly - Case Assembly Side
Object Number: 1968921 Size: MF
(25)13 Clutch
Figure 7:

Rear Case Assembly - Case Assembly Side
Object Number: 1968922 Size: LF
(6)B Cooling
(18)HL 12 Clutch
(30)HD 234 Clutch
(41)Void
Figure 8:

Case Assembly - Control Valve Upper Body Assembly Side
Object Number: 1968925 Size: MF
(5)A Cooling
(6)B Cooling
(18)HL 12 Clutch
(25)13 Clutch
(30)HD 234 Clutch
(33)4th Clutch
(41)Void
Figure 9:

Control Valve Upper Body Assembly - Case Assembly Side
Object Number: 1968928 Size: MF
(2)Line
(5)A Cooling
(6)B Cooling
(12)PCS Line
(14)Auxiliary Line
(18)HL 12 Clutch
(25)13 Clutch
(30)HD 234 Clutch
(33)4th Clutch
(38)Exhaust
(41)Void
(43)Auxiliary Line Boost
Figure 10:

Control Valve Upper Body Assembly - Control Valve Channel Plate Side
Object Number: 1968929 Size: MF
(2)Line
(3)Line or Auxiliary Line
(5)A Cooling
(6)B Cooling
(10)Actuator Feed Limit
(11)PS1
(12)PCS Line
(14)Auxiliary Line
(15)PCS 3 Signal
(16)HL 12 Clutch/4th Clutch Feed
(17)HL 12 Clutch/4th Clutch Feedback
(18)HL 12 Clutch
(19)PCS 4 Signal
(20)Solenoid 1 Signal
(21)PS3
(22)PS4
(23)13 Clutch/A Cooling Feed
(24)13 Clutch Feedback
(25)13 Clutch
(26)PCS 2 Signal
(27)HD 234 Clutch/B Cooling Feed
(28)HD 234 Clutch Feedback
(29)HD 234 Clutch Supply
(30)HD 234 Clutch
(31)Solenoid 2 Signal
(32)4th Clutch/B Cooling Feed
(33)4th Clutch
(34)4th Clutch/B Cooling Supply
(35)PS5
(36)Backfill
(37)Actuator Feed Limit/Backfill
(38)Exhaust
(41)Void
(42)PCS 5 Signal
(43)Auxiliary Line Boost
(44)PCS 6 Signal
Figure 11:

Control Valve Body Spacer (w/Gasket) Plate Assembly - Control Valve Upper Body Assembly Side
Object Number: 1968930 Size: MF
(2)Line
(3)Line or Auxiliary Line
(5)A Cooling
(6)B Cooling
(10)Actuator Feed Limit
(11)PS1
(12)PCS Line
(14)Auxiliary Line
(15)PCS 3 Signal
(16)HL 12 Clutch/4th Clutch Feed
(17)HL 12 Clutch/4th Clutch Feedback
(18)HL 12 Clutch
(19)PCS 4 Signal
(20)Solenoid 1 Signal
(21)PS3
(22)PS4
(23)13 Clutch/A Cooling Feed
(24)13 Clutch Feedback
(25)13 Clutch
(26)PCS 2 Signal
(27)HD 234 Clutch/B Cooling Feed
(28)HD 234 Clutch Feedback
(29)HD 234 Clutch Supply
(31)Solenoid 2 Signal
(32)4th Clutch/B Cooling Feed
(34)4th Clutch/B Cooling Supply
(35)PS5
(36)Backfill
(37)Actuator Feed Limit/Backfill
(38)Exhaust
(42)PCS 5 Signal
(43)Auxiliary Line Boost
(44)PCS 6 Signal
Figure 12:

Control Valve Channel Plate - Control Valve Upper Body Assembly Side
Object Number: 1968933 Size: MF
(2)Line
(3)Line or Auxiliary Line
(5)A Cooling
(6)B Cooling
(10)Actuator Feed Limit
(11)PS1
(12)PCS Line
(14)Auxiliary Line
(15)PCS 3 Signal
(16)HL 12 Clutch/4th Clutch Feed
(17)HL 12 Clutch/4th Clutch Feedback
(18)HL 12 Clutch
(19)PCS 4 Signal
(20)Solenoid 1 Signal
(21)PS3
(22)PS4
(23)13 Clutch/A Cooling Feed
(24)13 Clutch Feedback
(25)13 Clutch
(26)PCS 2 Signal
(27)HD 234 Clutch/B Cooling Feed
(29)HD 234 Clutch Supply
(31)Solenoid 2 Signal
(32)4th Clutch/B Cooling Feed
(34)4th Clutch/B Cooling Supply
(35)PS5
(36)Backfill
(37)Actuator Feed Limit/Backfill
(38)Exhaust
(41)Void
(42)PCS 5 Signal
(43)Auxiliary Line Boost
(44)PCS 6 Signal
Figure 13:

Control Valve Channel Plate - Control Solenoid Valve Assembly Side
Object Number: 1968935 Size: MF
(10)Actuator Feed Limit
(11)PS1
(12)PCS Line
(15)PCS 3 Signal
(19)PCS 4 Signal
(20)Solenoid 1 Signal
(21)PS3
(22)PS4
(26)PCS 2 Signal
(31)Solenoid 2 Signal
(35)PS5
(38)Exhaust
(41)Void
(42)PCS 5 Signal
(44)PCS 6 Signal
Figure 14:

Control Solenoid (w/Body and TCM) Valve Assembly - Control Valve Channel Plate Side
Object Number: 1968938 Size: MF
(10)Actuator Feed Limit
(11)PS1
(12)PCS Line
(15)PCS 3 Signal
(19)PCS 4 Signal
(20)Solenoid 1 Signal
(21)PS3
(22)PS4
(26)PCS 2 Signal
(31)Solenoid 2 Signal
(35)PS5
(41)Void
(42)PCS 5 Signal
(44)PCS 6 Signal
Figure 15:

2WD Output Housing Extension Assembly - Rear Case Assembly Side
Object Number: 1968943 Size: MF
(39)Seal Drainback