"Klunk!" One Time Noise When Backing Up

[tetzyamis]

Originally Posted by Doug007

I seem to recall a post about the ABS resetting causing such a noise.

This interests me, but I can't find the post.
Maybe it got lost from the hack

I was paying attention to when it makes the clunk noise.
When the car just starts, no clunk when I shift from P to R.
After driving 10 miles, shift from D to R makes clunk noise.
Even if I shift to N and wait a few secs and then shift to R, it still makes clunk noise.
After that one time clunk, it won't clunk again until I drive another 10 miles or so.
If I drive for over 30 miles at once, it won't clunk from shifting D to R.
Weird.