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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L80-E/4L85-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Descriptin And Operation >> Fluid Passages

Fluid Passages

Fig 1: Pump Body Fluid Passages (Pump Cover Side)
GM55234Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Suction
1 Suction
1 Suction
2 Line
2 Line
2 Line
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
3 Regulated Apply
7 Converter Feed
7 Converter Feed
8 Regulated Converter Feed
8 Regulated Converter Feed
8 Regulated Converter Feed
9 TCC Enable
9 TCC Enable
10 Converter Release
11 Converter Apply/Return
12 Cooler
12 Cooler
12 Cooler
14 Torque Signal
14 Torque Signal
29 Pump Seal Drainback
29 Pump Seal Drainback
30 TCC Signal
43 Reverse
43 Reverse
45 Exhaust
47 Void
47 Void
47 Void
47 Void
47 Void
47 Void
48 Vent
48 Vent
49 Front Lube
Fig 2: Pump Cover Fluid Passages (Pump Body Side)
GM54768Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Suction
1 Suction
1 Suction
2 Line
2 Line
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
3 Regulated Apply
3 Regulated Apply
7 Converter Feed
7 Converter Feed
7 Converter Feed
8 Regulated Converter Feed
8 Regulated Converter Feed
8 Regulated Converter Feed
8 Regulated Converter Feed
9 TCC Enable
9 TCC Enable
10 Converter Release
10 Converter Release
11 Converter Apply/Return
11 Converter Apply/Return
12 Cooler
12 Cooler
14 Torque Signal
14 Torque Signal
19 Drive
29 Pump Seal Drainback
30 TCC Signal
30 TCC Signal
40 Overrun Clutch
43 Reverse
43 Reverse
43 Reverse
45 Exhaust
45 Exhaust
47 Void
47 Void
48 Vent
48 Vent
48 Vent
49 Front Lube
208 Plug, Orificed Cup
236 Plug, Orificed Cup
237 Plug, Orificed Cup
Fig 3: Pump Cover Fluid Passages (Case Side)
GM55253Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Suction
2 Line
2 Line
3 Regulated Apply
12 Cooler
14 Torque Signal
19 Drive
19 Drive
29 Pump Seal Drainback
30 TCC Signal
40 Overrun Clutch
40 Overrun Clutch
43 Reverse
45 Exhaust
45 Exhaust
45 Exhaust
45 Exhaust
47 Void
48 Vent
49 Front Lube
49 Front Lube
210 Plug, Orificed Cup
239 Shield, Vent
Fig 4: Case Fluid Passages (Pump Cover Side)
GM54772Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Suction
2 Line
3 Regulated Apply
8 Connector, Front Oil Cooler Pipe
9 Pipe, Vent
12 Cooler
12 Cooler
13 Center Lube
14 Torque Signal
19 Drive
30 TCC Signal
40 Overrun Clutch
43 Reverse
48 Vent
48 Vent
90 Connector, Rear Oil Cooler Pipe
Fig 5: Case Fluid Passages (Control Valve Body Side)
GM54777Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Suction
1 Suction
2 Line
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
3 Regulated Apply
3 Regulated Apply
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
12 Cooler
12 Cooler
13 Center Lube
14 Torque Signal
14 Torque Signal
14 Torque Signal
16 PRN (Park Reverse Neutral)
16 PRN (Park Reverse Neutral)
17 PRND43
17 PRND43
18 PRND4
19 Drive
19 Drive
19 Drive
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
22 2-3 Signal
22 2-3 Signal
23 2-3 Drive
23 2-3 Drive
24 2nd Clutch
24 2nd Clutch
24 2nd Clutch
25 Filtered 2-3 Drive
26 Accumulator
26 Accumulator
26 Accumulator
28 2nd Accumulator
28 2nd Accumulator
30 TCC Signal
30 TCC Signal
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
32 3rd Accumulator
33 3rd Clutch Feed
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
35 3rd/Reverse
36 4th Clutch Feed
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
39 D321
39 D321
39 D321
40 Overrun Clutch
40 Overrun Clutch
40 Overrun Clutch
41 D21
41 D21
42 Lo
42 Lo
42 Lo
42 Lo
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
44 RBA (Rear Band Apply)
44 RBA (Rear Band Apply)
45 Exhaust
45 Exhaust
47 Void
47 Void
47 Void
47 Void
47 Void
50 Rear Lube
90 Connector, Rear Oil Cooler Pipe
Fig 6: Spacer Plate to Case Gasket with Accumulator Housing Gasket
GM55309Courtesy of GENERAL MOTORS CORP.
Callout Component Name
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
3 Regulated Apply
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
14 Torque Signal
14 Torque Signal
14 Torque Signal
14 Torque Signal
14 Torque Signal
16 PRN (Park Reverse Neutral)
16 PRN (Park Reverse Neutral)
17 PRND43
18 PRND4
18 PRND4
19 Drive
19 Drive
19 Drive
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
22 2-3 Signal
22 2-3 Signal
23 2-3 Drive
23 2-3 Drive
24 2nd Clutch
24 2nd Clutch
25 Filtered 2-3 Drive
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
28 2nd Accumulator
30 TCC Signal
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
32 3rd Accumulator
33 3rd Clutch Feed
33 3rd Clutch Feed
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
35 3rd/Reverse
36 4th Clutch Feed
36 4th Clutch Feed
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
38 4th Accumulator
39 D321
39 D321
39 D321
39 D321
40 Overrun Clutch
41 D21
41 D21
42 Lo
42 Lo
42 Lo
42 Lo
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
44 RBA (Rear Band Apply)
45 Exhaust
45 Exhaust
45 Exhaust
45 Exhaust
47 Void
Fig 7: Spacer Plate
GM54780Courtesy of GENERAL MOTORS CORP.
Callout Component Name
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
3 Regulated Apply
4 Orificed Regulator Apply
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
6 Orificed Actuator Feed
14 Torque Signal
14 Torque Signal
14 Torque Signal
14 Torque Signal
16 PRN (Park Reverse Neutral)
16 PRN (Park Reverse Neutral)
17 PRND43
18 PRND4
18 PRND4
19 Drive
19 Drive
19 Drive
19 Drive
19 Drive
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
21 1-2 Signal
22 2-3 Signal
22 2-3 Signal
22 2-3 Signal
23 2-3 Drive
23 2-3 Drive
23 2-3 Drive
24 2nd Clutch
24 2nd Clutch
24 2nd Clutch
24 2nd Clutch
25 Filtered 2-3 Drive
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
26 Accumulator
27 Orificed Accumulator
28 2nd Accumulator
28 2nd Accumulator
28 2nd Accumulator
30 TCC Signal
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
32 3rd Accumulator
32 3rd Accumulator
32 3rd Accumulator
33 3rd Clutch Feed
33 3rd Clutch Feed
33 3rd Clutch Feed
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
35 3rd/Reverse
36 4th Clutch Feed
36 4th Clutch Feed
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
38 4th Accumulator
38 4th Accumulator
38 4th Accumulator
39 D321
39 D321
39 D321
39 D321
39 D321
40 Overrun Clutch
40 Overrun Clutch
40 Overrun Clutch
41 D21
42 Lo
42 Lo
42 Lo
42 Lo
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
44 RBA (Rear Band Apply)
45 Exhaust
45 Exhaust
45 Exhaust
45 Exhaust
46 Orificed Exhaust
46 Orificed Exhaust
47 Void
Fig 8: Spacer Plate to Control Valve Body Gasket
GM54627Courtesy of GENERAL MOTORS CORP.
Callout Component Name
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
4 Orificed Regulator Apply
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
6 Orificed Actuator Feed
14 Torque Signal
14 Torque Signal
14 Torque Signal
14 Torque Signal
15 Orificed Torque Signal
16 PRN (Park Reverse Neutral)
17 PRND43
18 PRND4
18 PRND4
19 Drive
19 Drive
19 Drive
19 Drive
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
21 1-2 Signal
22 2-3 Signal
22 2-3 Signal
22 2-3 Signal
23 2-3 Drive
24 2nd Clutch
24 2nd Clutch
25 Filtered 2-3 Drive
26 Accumulator
26 Accumulator
26 Accumulator
27 Orificed Accumulator
28 2nd Accumulator
28 2nd Accumulator
30 TCC Signal
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
32 3rd Accumulator
32 3rd Accumulator
33 3rd Clutch Feed
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
35 3rd/Reverse
36 4th Clutch Feed
36 4th Clutch Feed
37 4th Clutch
37 4th Clutch
37 4th Clutch
37 4th Clutch
38 4th Accumulator
38 4th Accumulator
39 D321
39 D321
39 D321
40 Overrun Clutch
40 Overrun Clutch
41 D21
41 D21
41 D21
42 Lo
42 Lo
42 Lo
42 Lo
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
44 RBA (Rear Band Apply)
45 Exhaust
45 Exhaust
46 Orificed Exhaust
46 Orificed Exhaust
47 Void
47 Void
Fig 9: Control Valve Body Fluid Passages (Case Side)
GM54783Courtesy of GENERAL MOTORS CORP.
Callout Component Name
2 Line
2 Line
2 Line
2 Line
2 Line
2 Line
3 Regulated Apply
4 Orificed Regulator Apply
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
5 Actuator Feed
6 Orificed Actuator Feed
14 Torque Signal
14 Torque Signal
14 Torque Signal
14 Torque Signal
14 Torque Signal
16 PRN (Park Reverse Neutral)
16 PRN (Park Reverse Neutral)
17 PRND43
17 PRND43
17 PRND43
18 PRND4
18 PRND4
18 PRND4
18 PRND4
19 Drive
19 Drive
19 Drive
19 Drive
19 Drive
20 Filtered Actuator Feed
20 Filtered Actuator Feed
20 Filtered Actuator Feed
21 1-2 Signal
21 1-2 Signal
21 1-2 Signal
22 2-3 Signal
22 2-3 Signal
22 2-3 Signal
22 2-3 Signal
23 2-3 Drive
23 2-3 Drive
24 2nd Clutch
25 Filtered 2-3 Drive
25 Filtered 2-3 Drive
26 Accumulator
26 Accumulator
26 Accumulator
27 Orificed Accumulator
28 2nd Accumulator
30 TCC Signal
30 TCC Signal
31 FBA (Front Band Apply)
31 FBA (Front Band Apply)
32 3rd Accumulator
32 3rd Accumulator
33 3rd Clutch Feed
34 3rd Clutch
34 3rd Clutch
34 3rd Clutch
35 3rd/Reverse
36 4th Clutch Feed
36 4th Clutch Feed
37 4th Clutch
37 4th Clutch
37 4th Clutch
38 4th Accumulator
38 4th Accumulator
39 D321
39 D321
40 Overrun Clutch
40 Overrun Clutch
41 D21
41 D21
41 D21
42 Lo
42 Lo
42 Lo
42 Lo
42 Lo
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
43 Reverse
44 RBA (Rear Band Apply)
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
50 Rear Lube
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