Tranny making loud ticking noise in reverse?

ASSISTANCE Stock Engine-Bay Components
1

It’s an auto tranny.

WTF?

2

can anyone help, what is this noise. it started about 6 months ago and only happens when moving in reverse.

3

axle maybe? are your boots busted?

4

me tooo

i have new axles and about every 4th time i go in reverse it grinds