Basics
This component transfers power from the engine to the transmission.
What is the torque converter?
This type of hydraulic pressure determines the amount of line pressure applied during shifts.
What is throttle pressure?
The primary purpose of a manual valve in the valve body is this.
What is directing fluid flow to different circuits based on gear selection?
The stator in a torque converter performs this primary function.
What is redirecting fluid flow to increase torque multiplication?
This was the first automatic transmission offered by General Motors in 1939.
What is the Hydra-Matic?
This type of transmission does not require manual shifting.
What is an automatic transmission?
In an automatic transmission, this valve modulates line pressure based on engine load.
What is the pressure regulator valve?
A sticky shift valve can cause this symptom during upshifts.
What is delayed or harsh shifting?
When diagnosing a torque converter failure, the presence of blueing on the stator or turbine usually indicates this problem.
What is overheating due to prolonged slip?
This transmission replaced the TH350 in GM vehicles and introduced overdrive.
What is the 700R4?
The number of forward gears in a standard 4L60E transmission.
What is 4?
This hydraulic circuit ensures pressure increases under heavy acceleration or load.
What is the boost circuit?
This tool is used to recondition worn valve bores during a rebuild.
What is a reaming tool or oversized valve kit?
A torque converter with an excessively high stall speed can cause this major drivability issue.
What is sluggish acceleration or excessive heat buildup?
This term refers to electronically controlled automatic transmissions introduced in the 1990s.
What is Electronic Pressure Control (EPC) transmissions?
This fluid is vital for cooling and lubricating the transmission.
What is automatic transmission fluid (ATF)?
When a spool valve sticks in the bore due to wear or contamination, this condition can occur.
What is pressure leakage or shift timing issues?
In a 4L60E, this solenoid controls TCC apply and release.
What is the PWM solenoid (Pulse Width Modulation solenoid)?
This specific component inside the torque converter prevents the stator from freewheeling during torque multiplication.
What is the one-way sprag clutch?
The ZF8HP transmission is notable for having this number of forward gears.
What is 8?
This gear allows a vehicle to move backward.
What is reverse gear?
Name the specific function of a 2-3 accumulator in a 4L80E transmission.
What is cushioning the 2-3 shift to reduce harshness?
A separator plate with excessive wear at the check ball locations can lead to this issue.
What is fluid cross-leakage or pressure loss?
A torque converter exhibiting “ballooning” will cause this type of internal engine or transmission damage.
What is pump bushing wear, seal damage, or crankshaft thrust bearing failure?
This Chrysler rear-wheel drive transmission was notorious for its aluminum case in the 1960s.
What is the TorqueFlite A727?