Transmission Component and System Description

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The mechanical components of this unit are as follows:

A torque converter with an electronically controlled capacity clutch (ECCC)
This transmission is equipped with an ECCC. The pressure plate does not fully lock to the torque converter cover. Instead, the pressure plate maintains a small amount of slippage, about 20 RPM, in SECOND, THIRD, and FOURTH gears, depending on the vehicle application. ECCC was developed to reduce the possibility of noise, vibration, or chuggle caused by TCC apply. Typical apply speeds are 49-52 km/h (30-32 mph) in THIRD gear and 65-73 km/h (40-45 mph) in FOURTH gear. Full lockup is available at highway speeds on some applications.
A drive link assembly
Intermediate/4th and Lo/Reverse friction band assemblies
Forward, Coast, 2nd, Reverse, and Direct multiple disc clutch assemblies
Two planetary gear sets: Input and Reaction
Two roller clutches - Lo and 2nd
One sprag clutch
One vane type oil pump
One control valve assembly
A final drive and differential assembly

The electrical components of this unit are as follows:

Two shift solenoid valves, 1-2 and 2-3
A torque converter clutch pulse width modulated (TCC PWM) solenoid valve
A transmission pressure control (PC) solenoid valve
An automatic transmission fluid temperature (TFT) sensor
Two speed sensors: input and output speed sensor
An automatic transmission fluid pressure (TFP) manual valve position switch assembly
An automatic transmission wiring harness assembly
A park/neutral position (PNP) switch

For more information refer to Electronic Component Description .