Jonm Deere Buck 500 Screeching noise

I have a 2005/6 John Deere Buck (Traxter) 500 auto shift. There is a loud screeching noise when in motion. I determined the noise was coming from the shield in front of the coupling on the input to the rear differential. This shield is loose with a little play, does not rotate at idle, but turns and screeches when moving. Spraying WD40 on the shield eliminates the noise.
What would cause this and how do I permanently fix this?
Thank you.

Jonm Deere Buck 500 Screeching noise

I have a 2005/6 John Deere Buck (Traxter) 500 auto shift. There is a loud screeching noise when in motion. I determined the noise was coming from the shield in front of the coupling on the input to the rear differential. This shield is loose with a little play, does not rotate at idle, but turns and screeches when moving. Spraying WD40 on the shield eliminates the noise.
What would cause this and how do I permanently fix this?
Thank you.