Chevrolet Sonic Repair Manual: Neutral - Engine Running (Gen 1)
When the gear selector is moved to the Neutral (N) position, the hydraulic and electrical system operation is identical to Park (P) range. However, if Neutral is selected after the vehicle was operating in Reverse (R), the normally-high 35R pressure control solenoid 2 is commanded OFF and the following changes would occur in the hydraulic system.
- 3-5 Reverse Clutch Releases
-
Manual Valve
The manual valve is moved to the Neutral position and blocks line pressure from entering the reverse fluid circuit. Reverse fluid, from the 3-5-reverse clutch regulator valve and the clutch select valve, is opened to an exhaust passage at the manual valve.
35R Pressure Control Solenoid 2
The 35R PC solenoid 2 is commanded OFF allowing PCS 35 reverse clutch fluid from the 3-5-reverse clutch regulator valve to exhaust.
3-5-Reverse Clutch Regulator Valve
PCS 35 reverse clutch fluid exhausts, allowing 3-5-reverse clutch regulator valve spring force to move the 3-5-reverse clutch regulator valve to the released position. This allows 35 reverse clutch fluid pressure to exhaust into the compensator feed circuit in order to assist the 3-5-reverse clutch piston spring to quickly release the 3-5-reverse clutch.
3-5-Reverse Clutch
3-5-reverse clutch spring force, assisted by compensator feed pressure, moves the 3-5-reverse clutch piston to release the 3-5-reverse clutch plates and force 35 reverse clutch fluid to exhaust from the 3-5-reverse and 4-5-6 clutch housing assembly. The exhausting 35 reverse clutch fluid pressure is routed to the 3-5-reverse clutch regulator valve where it enters the 35 reverse clutch feed/compensator feed circuit.
Clutch Select Valve
When reverse fluid exhausts from the default override shuttle valve, shift solenoid fluid continues to hold the clutch select valve against clutch select valve spring force allowing 35 reverse clutch feed fluid to exhaust into the reverse circuit.
- Neutral?EEngine Running
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Lubrication Description
Oil is applied under pressure to the crankshaft (8), connecting rods (5), camshaft
adjuster (1), camshaft bearing surfaces (3) and valve tappets (4). All other movi ...
Neutral - Engine Running (Gen 2)
When the gear selector is moved to the Neutral (N) position, the hydraulic and
electrical system operation is identical to Park (P) range. However, if Neutral
is selected after the vehicle was ope ...
Other materials:
Engine Block Cleaning and Inspection
Special Tools
EN-8087 Cylinder Gauge
For equivalent regional tools, refer to Special Tools.
Clean the sealing material from the gasket mating surfaces (2).
Clean the engine block (1) and lower crankcase in a cleaning tank with solvent
appropriate for aluminum. Refer ...
Starter Replacement (LUW)
Removal Procedure
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the drivetrain and front suspension frame skid plate. Refer to
Drivet ...
Transmission Replacement
Removal Procedure
Remove the battery and battery tray. Refer to
Battery Tray Replacement.
Disconnect the transmission range selector lever cable
terminal (1) from the transmission manual pin.
Press the locking tab forward in order to release
the tran ...
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