I have a 1949 Chrysler new Yorker. I bought about a month ago. Drove around town with the seller, even had him drive it up to place of purchase. Drove it home that night and parked it in the garage. Ordered new freeze plugs because some were bad, also changed the oil. Installed freeze plugs this past weekend went for a drive to test and now it wont shift into second when letting off the throttle I can shift between low and high but seems like it only wants to stay in first. Shift to low it will go again then just high rev. I made it to a gas station down the street and back home. Any ideas what's going on with the transmission? I have checked wiring to governor, solenoid and interrupter switch, and connections look good bit saturated in oil that's it.