Just put tags on the 64 Convertible yesturday. Drove it home from the office, took the wife out on date and all is well. I start her up this morning and put in drive and a hissing noise begins to emminate from what sounds like the steering column. I checked all fluids - topped off the trans., pwr steering, and brake fluid, but noise continues. It sounds like an air leak and seems to lessen when I accelerate. The sound stops when the car is in park. Also parking brake did not disengauge when I put the car in gear. Anyone have any idea what may be causing the above?