Choose how to learn
Lesson review: 0 / 7
Learn · seven mini-lessons
Explore · how components work together
Choose a component to identify its job and the service reasoning it supports.
Four power-flow journeys
Virtual lab · gear reduction & differential wheel speeds
This idealized open-differential teaching model assumes a symmetric differential and ignores losses in the speed equation. It does not predict wheel traction, locking action, limited-slip behavior, gear health, or actual vehicle specifications.
Formula: carrier rpm = pinion rpm ÷ final-drive ratio; in this ideal model, left + right rpm = 2 × carrier rpm. Slider settings that imply a negative right-wheel speed are flagged as outside this simplified forward-only exercise—not treated as a real drivetrain fault.
Diagnose · follow the evidence
Pick a fictional work order. Inspect the available evidence, then choose a justified next action. Making a decision before examining key facts triggers a learning prompt.
Check knowledge · 10 questions
Answer every question before scoring. Feedback is based on your selected answers; the quiz is not a hands-on skills assessment.
Instructor-observed practical skills · separate record
Use only with an instructor, actual applicable OEM procedures, a safely secured vehicle, and authorized equipment. This sheet is an observation aid, not an automatically awarded pass, vehicle-release authorization, or online certification.