ACDelco 10-4006 Synchromesh Manual Transmission Fluid - 1 qt Formulated specifically for synchromesh transmissions, resulting in excellent synchronizer performance Minimizes sludge and varnish deposits to provide for a cleaner transmission Protects against surface distress, minimizing spalling, pitting, rust, corrosion, and overall wear All-climate fluid that manages temperatures as low as -40 degrees Fahrenheit (-40 degrees Celsius) to as high as 300 degrees Fahrenheit (149 degrees Celsius)