Chevrolet Sonic Repair Manual: Drive Range, Second Gear (Gen 2)
As vehicle speed increases and operating conditions become appropriate, the transmission control module (TCM) processes input signals from the automatic transmission input and output speed sensors, the throttle position sensor and other vehicle sensors to determine the precise moment to command ON the normally-low 26 pressure control solenoid and shift the transmission into Second gear. The manual valve remains in the Drive (D) position and line pressure continues to feed the drive fluid circuit.
- 2-6 Clutch Applies
-
26 Pressure Control (PC) Solenoid
The 26 PC solenoid is commanded ON, allowing actuator feed limit fluid to enter the PCS 26 clutch fluid circuit. PCS 26 clutch fluid is then routed through orifice #24 to the 2-6 clutch regulator valve.
2-6 Clutch Regulator Valve
PCS 26 clutch fluid, at the 2-6 clutch regulator valve, opposes 2-6 clutch regulator valve spring force and orificed 26 clutch fluid pressure to regulate drive fluid pressure into the 26 clutch circuit. 26 clutch fluid is then routed through orifice #22 to the 2-6 clutch assembly in the transmission case, and through orifice #4 to the spring end of the 2-6 clutch regulator valve.
2-6 Clutch
The 26 clutch fluid from the 2-6 clutch regulator valve is routed through the transmission case to the 2-6 clutch piston assembly. The 26 clutch fluid pressure moves the piston against 2-6 clutch spring force to apply the 2-6 clutch plates.
Accumulator
PCS 26 clutch fluid is also routed to an accumulator valve. The accumulator valve is used to dampen any pressure irregularities occurring in the PCS 26 clutch fluid circuit. This helps to control clutch apply fluid pressure and clutch apply feel.
- Drive Range, Second Gear ?#8201;Gen 2/Hybrid
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Drive Range, Second Gear (Gen 1)
As vehicle speed increases and operating conditions become appropriate, the transmission
control module (TCM) processes input signals from the automatic transmission input
and output speed sensors ...
Drive Range, Sixth Gear (Gen 1)
As vehicle speed increases, the transmission control module (TCM) processes input
signals from the automatic transmission input and output speed sensors, the throttle
position sensor and other veh ...
Other materials:
Eliminating Unwanted Odors in Vehicles
GM Vehicle Care Odor Eliminator, Refer to Adhesives, Fluids, Lubricants, and
Sealers, may control or eliminate odors in the interior and luggage compartment
areas of GM vehicles. This non-toxic, biodegradable, odorless product has been shown
to greatly reduce or remove the following types of o ...
Turbocharger Disassemble
Special Tool
EN-49940 Remover Quick Connector
For equivalent regional tools, refer to Special Tools.
Remove the 2 turbocharger oil return pipe bolts (2).
Remove the turbocharger oil return pipe (1) and the sealing (3) from the
turbocharger.
Note ...
Low and Reverse Clutch Assembly and Low and Reverse Clutch Plate Installation
Low and Reverse Clutch Assembly and Low and Reverse Clutch Plate Installation
Callout
Component Name
1
Low and Reverse Clutch Assembly (OWC)
Note:
The Low and Reverse Clutch Assembly should rotat ...
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