Transmission Component And System Description; Adapt Function; Transmission Adapt Function; Automatic Transmission Shift Lock Control Description - Chevrolet Corvette 2005 Owner's Manual

2005 Chevrolet Corvette Restoration Kit
Transmission Component and System Description
The 4L60E transmission consists primarily of the following components:
• Torque converter assembly
• Servo assembly and 2-4 band assembly
• Reverse input clutch and housing
• Overrun clutch
• Forward clutch
•
3-4 clutch
• Forward sprag clutch assembly
• Lo and reverse roller clutch assembly
• Lo and reverse clutch assembly
• Two planetary gear sets: Input and Reaction
• Oil pump assembly
• Control valve body assembly
The electrical components of the 4L60-E are as follows:
• 1-2 and 2-3 shift solenoid valves
• 3-2 shift solenoid valve assembly
• Transmission pressure control (PC) solenoid
• Torque converter clutch (TCC) solenoid valve
• TCC pulse width modulation (PWM) solenoid valve
• Automatic transmission fluid pressure (TFP) manual valve position switch
• Automatic transmission fluid temperature (TFT) sensor
• Vehicle speed sensor assembly
Adapt Function
Transmission Adapt Function
The 4L60-E transmission uses a line pressure control system, which has the ability to continuously adapt
the system's line pressure. This compensates for normal wear of the following parts:
• The clutch fiber plates
• The seals
• The springs
The PCM maintains the Upshift Adapt parameters for the transmission The PCM monitors the AT ISS
sensor and the AT OSS during commanded shifts in order to determine if a shift is occurring too fast or
too slow. The PCM adjusts the signal from the transmission pressure control solenoid in order to maintain
a set shift feel.
Transmission adapts must be reset whenever the transmission is overhauled or replaced.
Automatic Transmission Shift Lock Control Description
The automatic transmission shift lock control is a safety device that prevents an inadvertent shift out of
PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of
the PARK position. The system consist of the following components:
• The automatic transmission shift lock control solenoid.
• The automatic transmission shift lock control switch.
• The park/neutral position switch.
With the ignition in the ON position battery positive voltage is supplied to the park/neutral position switch.
With the transmission in the PARK position the contacts in the park/neutral position switch are closed.
This allows current to flow through the switch to the automatic transmission shift lock control switch. The
circuit continues through the normally-closed switch to the automatic transmission shift lock control
solenoid. The automatic transmssion shift lock control soleniod is permanently grounded. This energizes
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