Hi everybody!!! I'm new here.....just purchased a 1956 Buick Super 322 nailhead and I need help!! The car was in a shed for many years, after talking to the owner he agreed to sell the car to me. Took the car home and after long hours working on it, finally I started it!! Did a rebuild fuel pump, rebuild carburetor, clean points and with the help of an auxiliary tank it come alive......lots of smoke,bad idling, etc when it warm out star to sound better except for a rattling noise, I think , coming from the transmission. Also I had to play with the shifter before a could started it. When the car was idling a guess got in gear and almost run over my dog!! With the help of two towers I raised the rear wheels tryed to start it again and notice than the rear right wheel was moving even that the shifter was in N.........try other shitifng position and the wheels will responded but when a put it in N couldn't disengage the wheel.....and still that rattling noise.Something is happening, this car will not start if the shifter is on P or N.......The owner told me that the car was running fine with sometimes having problems with the shifter, Any idea what the noise could be? Was very low in transmission fluid( I put new fluid but I noticed a huge leak under the car. Ready ordered new transmission gasket, oil gasket, differential gasket I will do a total fluid change before drive the car. Sorry about my written english but english is not my first language. Thanks a lot for your help, Daniel