[cleszkie]

Have you made any adjustments to the modulator? There is an allen head screw that can be accessed through the end of the nipple that the vacuum line attaches to. I believe turning this clockwise will push your shift points up in RPM, but make shifts much firmer. Perhaps it has been adjusted too far in (clockwise). Try backing it out and see how it affects your shift points. This is a quick check that will cost you nothing to do. Good luck.