Mercury 1999 Villager - Manual (Page 162)

automatic overdrive transaxle. When your vehicle cruises at a constant
speed for any length of time, this fourth gear will increase your fuel
economy.
Overdrive may not be appropriate
for certain terrains. If the transaxle
shifts back and forth between third
and fourth gears while you are
driving hilly roads or if your vehicle
requires additional power for climbing hills, press the O/D OFF switch.
Each time the vehicle is started, the transaxle will automatically return
to normal overdrive mode.
If your vehicle is on an extremely slippery surface, the Transaxle Control
Module may receive a signal indicating a rapid increase or decrease in
wheel speed. When the module detects this condition, it will limit the
transaxle operation to Third and Reverse gears. This reduces tire
slippage and protects the transaxle. The transaxle will operate normally
in Reverse, but will lack power during acceleration in Drive.
If this happens;
1. Stop your vehicle as soon as possible.
2. Turn the ignition off for three seconds.
3. Restart the vehicle.
If the condition still exists, contact your dealer as soon as possible.
If the O/D OFF indicator light is flashing on and off repeatedly when the
vehicle is started or does not come on when the O/D OFF control is
pressed, there may be a transaxle electronic system malfunction. You
should contact your dealer as soon as possible or damage to the
transaxle could occur.
When to use D (Drive) or press the O/D OFF switch
You will notice that there is only one
drive position on your gearshift
indicator (instead of Drive and
Overdrive). However, you will find a
control labeled OVERDRIVE located
on the gearshift lever. Push in the
switch and the O/D OFF light in the
instrument cluster will illuminate.
With the O/D OFF light illuminated, the transaxle will operate in first,
OVERDRIVE
OFF/ON
P R N D 2 1
OVERDRIVE
OFF/ON
Driving
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