Drive Range - Emergency Fifth Gear

Drive Range - Emergency Fifth Gear

If for any reason the entire electronic control system of the transmission become disabled, all five of the shift solenoid valves will be de-energized (OFF). This EMERGENCY MODE operating state of the solenoids forces the transmission to operate in Fifth gear regardless of other vehicle operating conditions when the gear selector lever is in a forward range. Also, in EMERGENCY MODE, the lock up pressure control solenoid valve is turned OFF in order to prevent TCC apply. This allows the vehicle to be operated safely, despite the disabled controls, until the condition can be corrected. If EMERGENCY MODE is enabled while the transmission is operating in DRIVE Range, the transmission will assume a Fifth gear hydraulic power flow state with the following exceptions.

3-4, 4-5 SHIFT SOLENOID VALVE ASSEMBLY (S4) DE-ENERGIZED

3-4, 4-5 Shift Solenoid (SS) Valve Assembly (S4)
The 3-4, 4-5 SS valve assembly is de-energized, allowing fluid pressure in the S4 signal (17) fluid circuit to exhaust through the solenoid.

Solenoid Relay Valve
45 enable (51) fluid pressure exhausts from the solenoid relay valve, passes through the U2 shift valve into the S4 signal (17) fluid circuit and continues on to the 3-4, 4-5 SS valve assembly where it exhausts into the sump.

LOCK UP PRESSURE CONTROL SOLENOID VALVE (SLU) DE-ENERGIZED

Lock Up Pressure Control Solenoid Valve (SLU)
The lock up pressure control solenoid valve is de-energized, allowing lock up control (12) fluid and TCC signal (13) fluid to exhaust through the solenoid.

PASSAGES
1. SUCTION
2. LINE
3. CONVERTER FEED
4. RELEASE
5. APPLY
6. EXHAUST ENABLE
7. COOLER
8. LUBE
9. SOLENOID MODULATOR
10. THROTTLE SIGNAL (SLT)
11. SHIFT CONTROL (SLS)
12. LOCK UP CONTROL (SLU)
13. TCC SIGNAL
14. S1 SIGNAL
15. S2 SIGNAL
16. S3 SIGNAL
17. S4 SIGNAL
18. S5 SIGNAL
19. DRIVE
20. DRIVE OR REVERSE
21. REGULATED DRIVE OR REVERSE
22. REVERSE
23. REVERSE CLUTCH
24. LOW AND REVERSE CLUTCH
25. REVERSE CONTROL
26. FORWARD CLUTCH
27. DIRECT CLUTCH FEED 1
28. DIRECT CLUTCH FEED 2
29. DIRECT CLUTCH
30. B2 CONTROL 1
31. B2 CONTROL 2
32. SECOND CLUTCH
33. B1 CONTROL 1
34. B1 CONTROL 2
35. B1 CONTROL 3
36. SECOND COAST CLUTCH
37. B5 CONTROL 1
38. B5 CONTROL 2
39. 1-2 REVERSE (B5) CLUTCH
40. 4-5 CLUTCH
41. B4 CONTROL
42. B4 RELEASE
43. SERVO RELEASE
44. SERVO FEED
45. SERVO APPLY
46. 3RD GEAR BAND APPLY
47. PN12345
48. PRN15
49. 234NCON
50. 345 ENABLE
51. 45 ENABLE
52. REVERSE INHIBIT
53. VENT
54. EXHAUST
55. SUMP
56. VOID
57. TORQUE CONVERTER SEAL DRAINBACK

Drive Range - Emergency Fifth Gear: