Driving my 75 Olds (H/O Cutlass Supreme), I seem to hear a lot of road noise over my left shoulder/left rear of the car as I'm driving. I'm suspecting with the "T" tops I'll get a bit more noise, but this seems different.
The weather stripping around the door is in tact, around the top and bottom. I can't quite figure out what might be the source? Any ideas to check?

 

The weatherstripping may be intact, in good condition and in the right spot, but are the T-tops / window door glass and door adjusted properly and sealing against the rubber?
Could also be insulation missing under the back seat and behind the back seat and under the floor. Who knows what previous work has gone on. Just a few thoughts.

 

There is insulation under and behind the back seat, carpet has insulation under it too. I'll check the fit on the door weather stripping.