Ford 2005 F250 Owner's Manual page 282

Maintenance and Specifications
Checking and adding manual transmission fluid (if equipped)
1. Clean the filler plug.
2. Remove the filler plug and
inspect the fluid level.
3. Fluid level should be at the
bottom of the opening.
4. Add enough fluid through the
filler opening so that the fluid level
is at the bottom of the opening.
5. Install and tighten the fill plug
securely.
Use only fluid that meets Ford specifications. Refer to Lubricant
specifications in this chapter.
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