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
reverse clutch hlll pressure pressure nc. on cdnyrol control control control cdnyrol control cl solemoin2 on: n.h on nh on nl or: nh. clutch clutch -5- closen clutch tohoue converter pcs mc ex bf cumpf release blow-off compensator feed unv fd mc applv i- drne -lwe overpressure 1234 cv fluid pressures suction converter lube line pcs line solenoid actuator compensatdr low cl cl
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:
Engine Compartment Fuse Block
LUV and LUW Engines
The engine compartment fuse block is on the driver side of the vehicle, near
the battery.
Caution
Spilling liquid on any electrical component on the vehicle may damage it.
Always keep the covers on any electrical component.
To access the fuses, press the clips together, ...
Instrument Panel Outer Trim Cover Replacement
Instrument Panel Outer Trim Cover Replacement
Callout
Component Name
1
Instrument Panel Outer Trim Cover (Qty:?€‰2)
Procedures
Use a flat bladed plastic trim tool in order to disengage the retainers
securi ...
Brake System Warning Light
The vehicle brake system consists of two hydraulic circuits. If one circuit is
not working, the remaining circuit can still work to stop the vehicle. For normal
braking performance, both circuits need to be working
If the warning light comes on, there is a brake problem. Have the brake system ...
0.0106