Torque Converter Stall Speed Test Procedure - 2,424 RPM Limit (Grand Marquis)

This document is a service procedure excerpt describing how to perform a torque converter stall speed test, labeled as "NOTE 2: Perform Stall Speed Test." It instructs that the test must be conducted with engine coolant and transmission fluid at normal operating temperature. The procedure lists five steps: (a) firmly apply the brakes; (b) connect a scan tool to monitor the rpm PID rather than using the instrument panel tachometer; (c) with the transmission selector in any forward gear, press the accelerator to the floor just long enough to reach wide open throttle (WOT), never holding the throttle open more than five seconds at a time, and release immediately if rpm exceeds the maximum limit of 2,424 rpm, which indicates clutch or band slippage; (d) note the results, with the maximum engine rpm limit for the affected vehicles stated as 2,424 rpm; and (e) after the WOT test, shift to NEUTRAL and run the engine at 1,000 rpm for about 15 seconds to cool the torque converter. The document was uploaded to a 2000 Mercury Grand Marquis gallery and appears to be part of a multi-page transmission diagnostic set, likely related to the accompanying TCC lockup issue pages.