Follow transmission fluid from sump to pump, pressure regulation, valve body, and clutch piston. Compare commanded pressure with what the hydraulics actually deliver.
Use the control panel to explore a generic, engine-driven hydraulic pump. Then diagnose five mystery service tickets. A pressure command is an electrical/control request; line pressure and clutch-apply pressure are hydraulic outcomes. Never infer one from the other without evidence.
Illustrative educational model only. Pressures and flow rates are invented—not OEM specifications. Real transmissions may use different pump drives, control-solenoid strategies, hydraulic circuits, multiple clutches, and fail-safe states. Never measure transmission pressure without the vehicle-specific service procedure, gauge, adapters, and safety precautions.
0 / 5 challenge tickets solvedSelect a case. The fault is hidden until your evidence-based answer is accepted.
Adjust controls to compare the regulated line and clutch circuits.
A pump may turn without delivering enough usable flow. The regulator sets line pressure; the selected valve-body path supplies a clutch. The clutch must fill and create sufficient apply force before it can carry torque without slipping.
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In mystery mode, gather at least two different checks that distinguish your case from a look-alike.
Choose a mystery ticket to begin the assessment.