Brake Fluid; Transmission Fluid; Checking Automatic Transmission Fluid (If Equipped) - Ford 2011 F-250 Owner's Manual

Maintenance and Specifications

BRAKE FLUID

• Vacuum boost system
MAX
MIN
• Hydroboost system
The fluid level will drop slowly as the brakes wear, and will rise when the
brake components are replaced. Fluid levels between the top of the MIN
and MAX lines are within the normal operating range; there is no need to
add fluid. If the fluid levels are outside of the normal operating range,
the performance of your brake system could be compromised; seek
service from your authorized dealer immediately.

TRANSMISSION FLUID

Checking automatic transmission fluid (if equipped)

Refer to your scheduled maintenance information for scheduled
intervals for fluid checks and changes. Your transmission does not
consume fluid. However, the fluid level should be checked if the
transmission is not working properly, i.e., if the transmission slips or
shifts slowly or if you notice some sign of fluid leakage.
Automatic transmission fluid expands when warmed. To obtain an
accurate fluid check, drive the vehicle until it is at normal operating
temperature (approximately 20 miles [30 km]). Verify that the
transmission fluid temperature gauge, located on the instrument cluster,
is within normal range.
1. Drive the vehicle 20 miles (30 km) or until it reaches normal operating
temperature.
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2011 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)