I believe we can all agree that Ford engineered their Mustang automatic transmissions with soft shifts to ride well not perform hard! Soft shifts on a performance car like the Mustang equal short transmission life. Shorten up those shifts & make the tires chirp on the 1-2 with a Mustang shift kit or replacement Mustang valve body.
Mustang Automatic Valve Body & Shift Kit Tech Info
Your Mustang's automatic transmission's main focus is smooth shifting between gears. To accomplish this it often goes into two gears at once while shifting up, which is known as a shift overlap. To reduce or eliminate the shift overlap you will need to install a shift kit in your Mustang. Shift kits not only improve performance but they also reduce wear because the transmission won't be trying to drive in two gears at once.
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