Ford 2003 Explorer Owner's Manual page 179

Maintenance and Specifications
Low fluid level
Do not drive the vehicle if the fluid
level is at or below the bottom of
the dipstick.
High fluid level
Fluid levels above the safe range
may cause overheating, shift and/or
engagement concerns and internal
transmission damage. If an overfill
condition occurs, excess fluid should
be removed by a qualified technician.
Checking and adding manual transmission fluid (if equipped)
1. Clean the filler plug.
2. Remove the filler plug and
inspect the fluid level.
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