Drive Range, First Gear (Hydraulic Circuits)

As the vehicle speed increases, the transmission control module (TCM) receives input signals from the automatic transmission input and output speed sensors, throttle position sensor and other vehicle sensors to determine the precise moment to energize or turn on. Shift solenoid valve E is commanded ON. Shift solenoid valve D is already on and commanded for low pressure. 1-3-5-6-7-8-9 Clutch Applies 1-3-5-6-7-8-9 Clutch Regulator Valve Shift solenoid valve E is energized and applying pressure against the 1-3-5-6-7-8-9 clutch regulator valve allowing LINE (2) fluid to enter the 1356789 CLUTCH (33) fluid circuit. 1356789 CLUTCH (33) fluid is directed to the 1-3-5-6-7-8-9 clutch assembly. 1-3-5-6-7-8-9 Clutch Assembly 1356789 CLUTCH (33) fluid is directed through orifice # 29 into the 1-3-5-6-7-8-9 clutch assembly. 1356789 CLUTCH (33) fluid moves the piston against spring force to apply holding of the 1-3-5-6-7-8-9 clutch plates. 1-2-3-4-6-7-8-10 Reverse Clutch Applied 1-2-3-4-6-7-8-10 Reverse Clutch Regulator Valve Shift solenoid valve D is energized and applying low pressure against the 1-2-3-4-6-7-8-10 reverse clutch regulator valve allowing LINE (2) fluid to enter the 1234678-10R CLUTCH (30) fluid circuit. 1234678-10R CLUTCH (30) fluid is also directed through orifice #21 into the 1234678-10R CLUTCH FEEDBACK (31) fluid passage to the 1-2-3-4-6-7-8-10 reverse clutch regulator valve. 1-2-3-4-6-7-8-10 Reverse Clutch Assembly 1234678-10R CLUTCH (3o) fluid is directed through orifice # 24 into the 1-2-3-4-6-7-8-10 reverse clutch assembly but not with line pressure. It only has enough pressure to prevent the 1-2-3-4-6-7-8-10 Reverse Clutch from slip. Drive Range, First Gear

Drive Range, First Gear (Hydraulic Circuits) — figure 1

(1) Suction (2) Line (3) Pump Out (4) Decrease (5) Converter Feed (6) TCC Release (7) TCC Apply (8) Cooler Feed (9) Lube (10) VFS-TCC (11) Converter Return (12) VFS Line (13) Park On (14) Park Off (15) Feed Limit – Low (16) Feed Limit – High (17) Drive Default (18) Drive Latch (19) ON/OFF Signal (20) On/Off 1289-10 Reverse Clutch (21) 123456 Reverse Clutch (22) 123456 Reverse Clutch Feedback (23) 123456 Reverse Clutch Exhaust (24) 1289-10 Reverse Clutch (25) 1289-10 Reverse Clutch Feedback (26) 1289-10 Reverse Clutch Exhaust (27) 234579-10 Clutch (28) 234579-10 Clutch Feedback (29) 234579-10 Clutch Exhaust (30) 1234678-10 Reverse Clutch (31) 1234678-10 Reverse Clutch Feedback (32) 1234678-10 Reverse Clutch Exhaust (33) 1356789 Clutch (34) 1356789 Clutch Feedback (35) 1356789 Clutch Exhaust (36) 456789-10 Reverse Clutch (37) 456789-10 Reverse Clutch Feedback (38) 456789-10 Reverse Clutch Exhaust (39) Exhaust Backfill (40) Exhaust (41) Return to Park (42) On/Off Drive Latch (44) 234579-10/1356789 Clutch