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:
Radio Settings
Select and the following may display:
Auto Volume
Radio Favorites
Radio Tune Bar
Radio Text
XM Categories
Radio Factory Settings
Auto Volume
This feature adjusts the radio volume to compensate for road and wind noise as
the vehicle speeds up or slows down, so that the volume leve ...
Center Pillar Reinforcement Replacement
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair
Warning.
Warning: Refer to Glass and Sheet Metal Handling Warning.
Note: The center pillar upper stiffener is made of Dual Phase
Steel and should be replaced only at ...
Crankshaft Front Oil Seal Replacement
Special Tools
EN-960 Installer
EN-45000 Remover Oil seal
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
Place a drain pan underneath the front crankshaft seal area.
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