Nope, they're not going to keep you from burning up a worn out transmission. The whole story will be the quality of parts you have inside of it and their current condition. If the transmission has good quality part and in good condition the servos will help prevent the band from slipping but will not do anything to prevent the clutch plates inside from frying if they're marginal. A little extra transmission fluid pressure will help under WOT conditions, thats why I started putting the Transgo vacuum mod kits in transmissions I work on.