124 shifts better with amplifier unplugged
 

I have been trying to find which vac hose caused my poor shifting a few weeks ago. In the process I unplugged the vac line from the bottom center of the amplifier (round blue thing on drivers fenderwell?) Now both accelerating and slowing shifts are not as harsh, and no apparent flaring. Do I have a bad amplifier or a plugged line? Have only tested it for about a mile. Would a longer drive allow greater vac. loss? Any input is appreciated. :D