In second gear the intermediate servo applies and the second oil pressure remains there after the trans shifts into 3rd and 4th.In third and forth the inner cavity of the servo is fed third gear oil which has a larger diameter than the 2nd apply piston so the oil pushes off the piston.Here is the problem.The servo pin(unless it is a 200 3 speed )is not attached to the piston.2nd gear oil will continue to apply enough pressure to apply the pin even after the shift if you arte using any boost valve over the largest one ever installed at the factory and any of the 3 original servo inner springs.Here is why.The 3rd spring is calibrated to have enough force to hold off the pin against a given servo diameter and given line pressure when both cavities are chargedAny time you either remove the inner springinstall or install a boost valve bigger than .471 " you have upset the balance of the servo pin that was mathematically calculated to work with given pressures.The factory used the floating pin as a way to remove unwanted 2/3 AND 3/2 characteristics inherent in the original design of the trans.The pin was actually designed to introduce drag to improve function.Without the correct spring or one designed to hold off even the largest servo designed(CK 3.005")every car will have the band dragging the drum.Every single one,no questions asked ,at 3/4 and wot.The only fix is to attach the pin to the servo or use a spring that has been the real correction for this.Take it as fact or fictional .Much testing has been done to procve this.Study the servo for yourself and see.Guidance and support for this project was provided by Joel Rabe who I am extremely grateful to for pointing this out to me while I made the necessary corrections.Here is the solution.