Chevrolet Sonic Repair Manual: Transmission Adaptive Functions
The 6T30/40/45/50 transmission utilizes a line pressure control system during upshifts to compensate for the normal wear of transmission components. As the apply components within the transmission wear or change over time, shift time (the time required to apply a clutch) increase or decreases. In order to compensate for these changes, the transmission control module (TCM) adjusts the pressure commands to the various PC solenoids, to maintain the originally calibrated shift timing. The automatic adjusting process is referred to as ?daptive learning?and it is used to ensure consistent shift feel plus increase transmission durability. The TCM monitors the A/T input speed sensor (ISS) and the A/T output speed sensor (OSS) during commanded shifts to determine if a shift is occurring too fast (harsh) or too slow (soft) and adjusts the corresponding pressure control (PC) solenoid signal to maintain the set shift feel.
The purpose of the adapt function is to automatically compensate the shift quality for the various vehicle shift control systems. The adapt function is a continuous process that will help to maintain optimal shift quality throughout the life of the vehicle.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF
in each shift lever position.
For automatic transmission vehicles, the ignition should turn to LOCK/OFF
onl ...
Transmission Assemble (Gen 1)
Special Tools
3-9506289 Universal Adapter
R-0007758 Holding Fixture
S-9407197 Differential Rotating Tool
S-9407198 Differential Bearing Race Wrench
For equivalent regional tools, refer ...
Other materials:
Storing an SiriusXM Channel
Drivers are encouraged to set up XM channel favorites while the vehicle is not
moving. Tune to favorite stations using the pushbuttons, favorites button, and steering
wheel controls. See Defensive Driving.
A maximum of 36 stations can be programmed as favorites using the six pushbuttons
posit ...
Drive and Driven Sprocket, Drive Link, and Park Pawl Removal (6T30)
Drive and Driven Sprocket, Drive Link, and Park Pawl Removal
Callout
Component Name
1
Drive Link Lube Scoop
2
Drive Link Lube Scoop Seals
3
Drive Link Lube Fluid Se ...
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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