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Learn · seven mini-lessons
Explore · eight diagnostic evidence channels
Select an evidence channel to see what it can tell you—and what it cannot prove by itself.
Shift symptom → evidence question
| Observed behavior | What it describes | Evidence to compare next |
|---|---|---|
| Flare | Engine/input speed rises excessively during a shift before the next ratio carries torque. | Commanded gear, input/output speed, ratio transition, pressure/control command and apply-device evidence. |
| Harsh shift | Torque transfer occurs with excessive abruptness. | Load/temperature, pressure command versus response, adaptation/relearn status and mechanical apply/release timing. |
| Delayed engagement | Noticeable delay between selecting a range and torque transfer. | Fluid level/state, pressure rise, pump/intake evidence, valve/control response and apply-device fill. |
| Wrong ratio / ratio DTC | Measured speed relationship does not match the expected operating state. | Validate speed signals first, then compare command, actual ratio, clutch state and hydraulic evidence. |
Virtual lab · correlate ratio and pressure evidence
Choose a classroom target ratio, then adjust input/output speed and normalized pressure request/response. The calculations are mathematical teaching aids—not a vehicle-specific specification or pressure test.
Bar = closeness of calculated ratio to the selected classroom target.
Diagnostic sequence challenge
Work from complaint and conditions toward increasingly invasive testing.
Apply · evidence-gated diagnostic cases
Open the evidence first. A single code, scan PID, pressure reading or shift feel does not establish root cause.
Choose the most supported interpretation/next action
Check knowledge · 10 questions
This is an online concept check, not a hands-on competency test.
Instructor-observed practical · shift/ratio/pressure diagnosis
Use separately from the browser score. The instructor must select an appropriate vehicle or training unit and provide the exact service information and approved test equipment.
Complaint & setup
Speed & ratio evidence
Pressure/control evidence
Conclusion & verification
Preserved 11.7 resource
Stall-speed testing · student lab worksheet (DOCX)Use only with instructor approval and current vehicle-specific procedures. Stall testing is a high-load test and is not simulated or authorized by this web module.
Instructor: ____________________ Date: __________ Vehicle/Unit: ____________________