Chevrolet Sonic Repair Manual: Reverse (Gen 1)
When the gear selector lever is moved to the Reverse (R) position (from the Park position) the normally-high 35R pressure control solenoid 2 is commanded ON and the following changes occur in the transmission? hydraulic and electrical systems:
- 3-5-Reverse Clutch Applies
-
Manual Valve
With the manual valve in the reverse position, line pressure is directed into the reverse fluid circuit and routed to the clutch select valve.
Clutch Select Valve
Reverse fluid is routed to a differential area of the default override shuttle valve and assists shift solenoid fluid, present at the valve from Park position, in holding the clutch select valve against clutch select valve spring force. Reverse fluid passes through the clutch select valve into the 35 reverse clutch feed circuit and is routed to the #2 ball check valve. R1/456 clutch feed fluid, present at the valve from Park position, continues to pass through the valve into the R1 circuit in order to keep the low and reverse clutch applied.
#2 Ball Check Valve
3-5 reverse fluid passes through orifice #5, seats the #2 ball check valve against the drive 1-6 fluid passage, and enters the 35 reverse/drive 1-6 circuit. 35 reverse/drive 1-6 fluid is routed through orifice #25 to the 3-5-reverse clutch regulator valve.
35R Pressure Control (PC) Solenoid 2
The 35R PC solenoid 2 is energized (ON), allowing actuator feed limit fluid to enter the PCS 35 reverse clutch circuit. PCS 35 reverse clutch fluid is then routed through orifice #26 to the 3-5-reverse clutch regulator valve.
3-5-Reverse Clutch Regulator Valve
PCS 35 reverse clutch fluid, at the 3-5-reverse clutch regulator valve, opposes 3-5-reverse clutch regulator valve spring force and orificed 35 reverse clutch feedback fluid pressure to regulate 35 reverse clutch feed/drive 1-6 pressure into the 35 reverse clutch circuit. 35 reverse clutch fluid is then routed to the 3-5-reverse clutch, and through orifice #33 to the #6 ball check valve.
3-5-Reverse Clutch
35 reverse clutch fluid enters the 3-5-reverse and 4-5-6 clutch housing assembly to move the 3-5 reverse clutch piston against spring force and compensator feed fluid pressure to apply the 3-5-reverse clutch plates.
#6 Ball Check Valve
35 reverse clutch feed fluid unseats the #6 ball check valve, allowing excess pressure to pass into the actuator feed limit circuit. This helps to control clutch apply fluid pressure and clutch apply feel.
- Reverse
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Front Wheel Drive Shaft Seal Replacement - Left Side
Front Wheel Drive Shaft Seal Replacement - Left Side
Callout
Component Name
Preliminary Procedures
Raise and support the vehicle. R ...
Reverse (Gen 2)
When the gear selector lever is moved to the Reverse (R) position (from the Park
position) the normally-low 35R pressure control solenoid is commanded ON and the
following changes occur in the tra ...
Other materials:
Automatic Transmission
P (Park): This position locks the front wheels. It is the best position to use
when you start the engine because the vehicle cannot move easily.
Warning
It is dangerous to get out of the vehicle if the shift lever is not fully
in P (Park) with the parking brake firmly set. The vehicle can ro ...
Rear Wiper/Washer System Description and Operation
The rear window wiper motor is located inside the hatchback door and is directly
connected to the rear window wiper. Ignition voltage is supplied to the rear wiper
motor through the wiper switch. The hatchback rear window washer systems equipped
with a separate washer fluid pump, hose, and noz ...
Rear Wheel Bearing and Hub Replacement (Disc Brake)
Special Tools
EN–45059 Angle Meter
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and suitably support the vehicle. Refer to Lifting and Jacking
the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal
and Insta ...
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