qship96 wrote:with the proper fresh fluid{dexron3},especially a premium synthetic{Redline d4, or Mobil 1} there should be no need to add lubegard red to "cure" anything. adding lubegard BLACK will modify fluid characteristics that may help with shudder,etc symptoms of a worn transmission.Basically,with new fluid,if there are any issues with transmission- the transmission needs work!
Not so! Read the posts by texasoil and Q45tech.
Lubeguard Red (never Black in a Nissan!) added to say M1 ATF approximates the properties of Nissanmatic better for shifting.