If you've noticed that the automatic transmission on your classic Ford Mustang isn't shifting as smoothly as it once did, it may be time to replace the vacuum line on your transmission. Over time, your Mustang’s vacuum systems can rust and corrode, leaving holes or blockages. The rubber hose sections can also dry rot, leaving cracks that reduce the vacuum power required for smooth operation.

Replacement transmission vacuum lines and modulators ensure smooth and precise shifts. As you press the gas pedal, the modulator will apply higher control pressure for better transmission performance.

If you are looking to switch from an automatic to a manual transmission, check out our options for Mustang transmission conversion kits.