Need a TH 400 guru...

[3macs1]

Hi Tom:
You probally have changed a hundred of these but just to be sure when you get the governor out pin the moving parts with your fingers and turn the unit up and down several times to make sure the barrel valve inside moves back and forth freely if not you are going to have to take the pin out and clean it.I would be suprised if a vintage governor will fix this. Usually you need a lighter spring set up to get that later shift etc you are looking for.They may have to be ordered special.Good LucK