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In 2011, the Ford F-250 comes equipped with strong 6-liter and 7.3-liter diesel engines paired with a 6-speed automatic transmission. Some common issues with the factory-installed 6R140 transmission include a "shift flare" problem between 2nd and 3rd gears causing high RPMs, along with a delayed engagement when reversing. To fix this, the transmission shift solenoids need to be replaced. Another known problem is the occurrence of diagnostic trouble codes P0751, P0730, and/or P2700, which require replacing the coast one-way clutch mechanical diode and the coast clutch cylinder. Additional difficulties with the Super-Duty's 6-speed transmission may include delayed motion in forward and reverse, harsh shifting over time, and gear slippage due to a software glitch. This can be resolved by reprogramming the ECU.
In 2011, the Ford F250 transmission has been noted for experiencing issues such as leaks in the bell housing and concerns about shifting problems.