Drive Range - Second Gear

Drive Range - Second Gear:

DRIVE RANGE-SECOND GEAR

FORWARD CLUTCH - APPLIED
INTERMEDIATE CLUTCH - APPLIED
INTERMEDIATE ROLLER CLUTCH - HOLDING

As both vehicle speed and governor pressure increase, the force of governor oil acting on the 1-2 shift valve will overcome the force of regulated modulator oil pressure. This allows the 1-2 shift valve to open, permitting drive oil to enter the 2-3 drive passage Oil in this passage is called intermediate clutch oil.

Intermediate clutch oil from the 1-2 shift valve is directed as shown.
1. Intermediate Clutch
2. Rear Servo
3. Front Servo and Accumulator Pistons
4. 2-3 Shift Valve

BASIC CONTROL

Intermediate clutch oil from the 1-2 shift valve seats a one-way checkball and flows through an orifice to the intermediate clutch piston to apply the intermediate clutch. At the same time, intermediate clutch oil moves the accumulator piston against the 1-2 accumulator oil and the accumulator spring to maintain lower pressure in the clutch during a 1-2 shift for a smooth clutch apply. Intermediate clutch oil seats a second one-way checkball and flows to the front servo and accumulator pistons. Intermediate clutch oil is also directed to the 2-3 shift valve.

SUMMARY

The forward and intermediate clutches are applied. The transmission is in Drive Range - Second Gear.