CASE 08TransmissionAdvanced9 minutes

Commanded versus actual shift

2018 performance sedan · Flare during one upshift

Simulated evidenceNo vehicle commandsEvery decision explained

THE FAILURE SCENE

Enhanced transmission data is available from an exact licensed profile. Road testing is logged by a passenger or fixed equipment.

DTCManufacturer-specific ratio code

The exact transmission controller detected an incorrect ratio condition.

Command3→4 commanded

The controller requested the shift.

ActualInput speed flares 620 rpm

The measured ratio did not follow command during the event.

Fluid temperature218°F

The event is temperature-dependent and needs exact specification context.

DECISION 1 / 3

What is proven?

The trace repeats twice at the same fluid-temperature range.