Possible Resonator Problems???

[manofmayo]

Went up to my dad's today on Lopez Island. While cruising around some of the winding roads, I noticed a rattle at 1100-1300 rpms, accelerating lightly.

I have searched the site and concluded the most likely problem is the resonator. I don't think its the transmission, I'm not having any problems shifting or grinding.

Has anyone else had this problem in the NW?
Is there something else it could be?

If you need more info, let me know.

Thanks Harold