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Learn · seven mini-lessons
Explore · inside the torque converter
Select a component to connect its construction to its job, then compare four operating phases. The exact shapes and mounting arrangements vary by transmission.
Operating-phase comparison
| Phase | Impeller / turbine relationship | Stator behavior | Main idea |
|---|---|---|---|
| Near stall / launch | Impeller fast, turbine slow or stationary | Reaction is strongest; one-way device holds stator in its reaction direction | Largest hydrodynamic torque multiplication, high slip and heat generation potential |
| Acceleration | Turbine speed rises toward impeller speed | Reaction demand decreases | Torque ratio falls as speed ratio rises |
| Coupling range | Impeller and turbine speeds are closer | Stator can overrun/freewheel in many designs | Converter behaves mainly as a fluid coupling with some slip |
| Lockup applied | Cover/impeller side is mechanically connected to turbine side | Hydrodynamic slip is bypassed for the locked path | Reduced converter slip improves efficiency; many systems modulate apply rather than acting only fully on/off |
Virtual lab · converter speed ratio, slip & lockup
Move the impeller and turbine speed controls to see how converter slip and a simplified torque-ratio estimate change. Then apply the lockup clutch. The model is intentionally conceptual and is not a stall-speed or TCC-slip specification.
Apply · evidence before conclusions
These fictional cases practice evidence-based reasoning around converter and TCC concerns. Open the required evidence before choosing the most defensible next action. The cases do not replace a vehicle-specific diagnostic routine.
Your case notes are saved in this browser.
Evidence
Choose the most defensible next action
Check knowledge · 10 questions
This checks conceptual understanding only. It does not verify hands-on skill.
Autonatomy 11.2 Instructor Observation Sheet
Instructor-observed practical · torque converter & lockup fundamentals
This worksheet keeps browser learning separate from real observed performance. The instructor determines acceptable performance using the school’s equipment, safety procedures and current service information.
No automatic credential, practical pass, repair authorization or vehicle release is generated by this page.