Chevrolet Sonic Repair Manual: 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, the throttle position sensor and other vehicle sensors to determine the precise moment to command ON the normally-low 2-6 pressure control solenoid 4 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 4
The 26 PC solenoid 4 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 #37 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. With the 2-6 clutch regulator valve in this position, PS2 fluid is allowed to exhaust and the normally-closed PS2 switch closes.
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.
- Drive Range, Second Gear
low reverse cl clutch pressure pressure convrol nl on n.h nh on: nl clutch act fd um torque cl converter assemblv pcs ex bf -comp release pcs tdc cooler compensator feed regulator valve sol blow-off fluid pressures suction converter lube line pcs line solenoid actuator compensatdr
Drive Range, First Gear Engine Braking (Gen 2)
Note: Some models of the 6T30/40/45/50 automatic transmission are equipped with
an electric auxiliary fluid pump for use in hybrid vehicles (BAS+). Hybrid vehicles
do not require internal combusti ...
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 ...
Other materials:
If Steam Is Coming from the Engine Compartment
Warning
Steam from an overheated engine can burn you badly, even if you just open
the hood. Stay away from the engine if you see or hear steam coming from it. Just
turn it off and get everyone away from the vehicle until it cools down. Wait until
there is no sign of steam or coolant before yo ...
Rear Side Door Opening Floor Carpet Retainer Replacement
Rear Side Door Opening Floor Carpet Retainer Replacement
Callout
Component Name
Preliminary Procedure
Remove the rear seat cushion. Refer to Rear Seat Cushion Removal and
Installation.
1
Rear Si ...
Low and Reverse and 1-2-3-4 Clutch Housing Disassemble
Table 1:
Low and Reverse Clutch Piston Removal
Table 2:
1??? Clutch Piston Removal
Low and Reverse Clutch Piston Removal
Low and Reverse Clutch Piston Removal
Callout
Component Name
...
0.0053