Hello all, I'm hoping someone can help me troubleshoot a tapping sound on my 1969 220D Automatic. A few weeks back, it snapped the fan/water pump/alternator belt. So, rather than start the motor, I rolled down a hill in neutral. Yes it sounds goofy, but didn't want to heat the motor any.

Now, it has a tapping sound that's tied to the road speed of the car. (Not engine or transmission speed.) It's noticeable at 15+ MPH, and the frequency varies with road speed. If I'm moving along and I shift to neutral, the engine drops to idle but the tap stays exactly the same.

I'm wondering where this may be coming from. Did I kink the speedometer cable somehow when I came down the hill in neutral? I can't imagine I caused any internal issues to the tranny, any opinions? Shifting is perfect, engine runs like a top. I noticed the noise even before replacing the belt, so I don't think it has anything to do with that.

Any help will be much appreciated, I haven't been driving the car much since it happened!

-Rob