It is frustrating when one event or repair or thing makes us
think we damaged something else.

And too often , especially on our vintage cars, it is just a coincidence.

I agree that sitting on stands for a few weeks or jacking car with trans in park
is no big deal.

Also think that you should check rear axles.

Jack up the rear, put it in neutral, spin the wheels and listen and feel
for something binding or clunking.

Maybe with the windows down and a helper you can listen carefully and see if your
bicycle card in the spokes noise is coming from the front, rear, left , or right.

Do you feel anything in the shifter when this noise happens ?

__________________
80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250