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Home >> Mercury >> 2005 >> Sable Platinum Edition >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Diagnosis And Testing >> Shift Point Road Test

Shift Point Road Test

This test verifies that the shift control system is operating correctly.

  1. Bring engine and transaxle up to normal operating temperature.
  2. Operate vehicle with selector lever in (D) range.
  3. NOTE: Shift speed ranges are approximate for all applications. For specific applications (engine, axle ratio and application) refer to the Automatic Transmission Specification Issue available from Ford Customer Service Division.
  4. Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages using the shift speeds chart.
    SHIFT SPEEDS 3.0L 2V

    Throttle Position Range Shift KM/H MPH
    Closed OD 4-3 48 30
    Throttle OD, D 3-2 16 10
    OD, D 2-1 13 8
    Min. OD, D 1-2 18 11
    Throttle OD, D 2-3 29 18
    TP OD 3-4 56 35
    Voltage OD 4-3 55 34
    1.25 OD, D 3-2 24 15
    Wide OD, D 1-2 55 34
    Open OD, D 2-3 103 64
    Throttle OD 3-4 153 95
    OD 4-3 137 85
    OD, D 3-2 97 60
    OD, D 2-1 42 26
    SHIFT SPEEDS 3.0L 4V

    Throttle Position Range Shift KM/H MPH
    Closed OD 4-3 48 30
    Throttle OD, D 3-2 19 12
    OD, D 2-1 11 7
    Min. Throttle OD, D 1-2 16 10
    TP voltage OD, D 2-3 27 17
    1.25 OD 3-4 51 32
    Wide Open OD, D 1-2 64 40
    Throttle OD, D 2-3 122 76
    OD 3-4 152 95
    OD 4-3 145 90
    OD, D 3-2 106 66
    OD, D 2-1 47 29
  5. Stop vehicle and move selector lever to D range. Repeat Step 3. Transaxle will make all upshifts except 3-4 and torque converter clutch apply should occur above 39 km/h (24 mph).
  6. With vehicle speed above 39 km/h (24 mph), press accelerator pedal to floor, wide-open throttle (WOT). Transaxle should shift from third to second, or third to first, depending on the vehicle speed. The torque converter clutch should release.
  7. With vehicle speed above 48 km/h (30 mph), move the selector lever from D range to 1 range (LOW) and remove foot from accelerator pedal. Transaxle should immediately downshift to second gear. When vehicle speed drops below 24 km/h (15 mph), transaxle should downshift into first gear.
  8. If transaxle fails to upshift/downshift or TCC does not apply and release, refer to DIAGNOSIS BY SYMPTOM  for possible causes.