2012 Ford F250 Super Duty Owner Guide 4th Printing - Page 400

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. 400 2012 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)