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Home >> Mercury Truck >> 2008 >> Mariner 4WD V6-3.0L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Description and Operation >> Range Selection

Range Selection

Range Selection

The transaxle range selector lever has 6 positions: P, R, N, (D), 2, 1. In addition, a transmission control switch (TCS) allows the driver to prevent a shift to 4th gear (Overdrive) and uses engine compression to help slow the vehicle (engine braking) in 2nd and 3rd gear.





Park
No power flow is transferred through the transaxle in PARK. A shift lever connected to a set of cams presses the parking pawl into the park gear on the driven sprocket. This locks the final drive and prevents the vehicle from rolling. For safety reasons, always apply the parking brake whenever the vehicle is parked.

Reverse
REVERSE allows the vehicle to be operated in a rearward direction, at a reduced gear ratio. Engine braking is provided in REVERSE.

Neutral
As in PARK, there is no power transferred through the transaxle in NEUTRAL. However, the final drive is not locked by the parking pawl, so the wheels are free to rotate. The vehicle may be started in NEUTRAL.

Drive
The DRIVE position provides all automatic shifts (1st through 4th), apply and release of the torque converter clutch, and maximum fuel economy during normal operation. Engine braking is provided in the 4th gear. Fourth gear (Overdrive) may be canceled by depressing the transmission control switch (TCS) that is located on the transmission range selector. Engine braking is also provided in 2nd and 3rd gear with the TCS on.

Second Gear Position
SECOND provides a 2nd gear hold position after automatic or manual upshift or downshift. When SECOND is selected from a stop, the transaxle will start in 2nd gear for maximum traction on slippery surfaces. Engine braking is provided in 2nd gear when in the SECOND position.

Low Position
MANUAL LOW provides a 1st gear hold after automatic or manual downshift. The transaxle is prevented from downshifting into 1st gear above a specific speed approximately 48 km/h (30 mph) to protect the powertrain from over speeding. Engine braking is provided in MANUAL LOW position making it especially useful for descending steep grades.
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