For a view of the oil flow diagrams, refer to the 1996 TURM Manual.
As both the vehicle speed and the governor pressure increase, the force of the governor oil acts on the 2-3 shift valve and overcomes the force of the 2-3 TV spring and the shift TV oil. This allows the 2-3 shift valve to open, and the RND oil enters the direct clutch oil passage. This oil is called Direct clutch oil.
Direct clutch oil from the 2-3 shift valve is directed to the following components:
| • | The direct clutch exhaust checkball |
| • | The 3-2 control valve |
| • | The direct clutch and reverse checkball |
| • | The direct clutch accumulator checkball |
| • | The accumulator check valve |
| • | The intermediate servo |
| • | The third clutch pressure switch |
Basic Control
Direct clutch oil from the 2-3 shift valve flows along the following path:
- Past the direct clutch exhaust checkball
- Past the third clutch pressure switch
- To the direct clutch and reverse checkball, seating the checkball in the reverse passage
- To the inner area of the direct clutch piston, applying the direct clutch
At the same time, Direct clutch oil is directed along the following path:
- Past the direct clutch accumulator checkball into the direct clutch accumulator passage, where the oil is called Direct clutch accumulator oil
- To the direct clutch accumulator check valve, seating the check valve
- To the release side of the intermediate servo
The pressure of the direct clutch accumulator oil combines with the servo cushion spring. Together this moves the servo piston against the Second oil and acts as an accumulator for a smooth intermediate band release and a direct clutch apply.
Direct clutch oil also flows through the 3-2 control valve to the direct clutch accumulator passage.
Summary
The forward and direct clutches are applied and the intermediate band is released; the transmission is in Drive (D) Range - Third Gear.
