Loud clank!!

[Mike76251]

Low,
My '84 C-10 only does that if that bolt gets loose on the trans.
I would check your bolt as I have seen this fix quite a few of our trucks with a clunk going from park or drive to reverse.
it is a very easy fix.

Originally posted by LowC10
My truck make this same noise when shifting into reverse and drive. From what I've been told, it is normal. I could see the driveshaft turn a bit when someone else put it in reverse---I think that's what the noise is made from.