Good point on the rattling. Before, it would basically go away when it got to full operating temp. I will check that.

Does the Bowden cable have a direct impact on downshifting behavior? I was reading the recent post about that the cable, but did not see any mention of downshifting. My upshifts seem very similar if not the same as before...

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1983 300D- silver blue, tan leather, 205,000.
1975 Datsun 280Z. Stock, ready to restore.
1983 San Juan 23. Dry docked.