No 2-1 Downshift In "D" Position
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 Mercury Grand Marquis, 2002 Lincoln Town Car, 2002 Ford Crown Victoria, 2001 Mercury Mountaineer, and 2001 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
Intermediate clutch pressure, valve body (1-2 shift valve, 1-2 accumulator solenoid pressure regulator valve), Shift Solenoid No. 1 (SSA) failure, incorrectly tightened valve body bolts, pump assembly, intermediate clutch assembly, intermediate one-way clutch assembly or low one-way clutch (planetary) assembly.