Kraton Kraton makes grinding noise in reverse

[Hughmac24]

My kraton started to make a little clicking noise while braking, now it makes a grinding sound while in reverse as well. pretty sure its a diff problem but not sure where to look(Front/center/rear).
Very difficult to pinpoint where the sound comes from. and it wont make the noise when the truck is off the ground. Any Ideas where to look first?

 

[Josh nortz]

My kraton started to make a little clicking noise while braking, now it makes a grinding sound while in reverse as well. pretty sure its a diff problem but not sure where to look(Front/center/rear).
Very difficult to pinpoint where the sound comes from. and it wont make the noise when the truck is off the ground. Any Ideas where to look first?

I would stand next to it and see if you can determine front or rear it's most likely your ring and pinion gears. if you cannot decide what one it is its only a few screws to check or keep driving it till one stops moving...