Squeak at 800-1000 RPM

I still have a squeak/chirp at about 800 rpm when taking off from a stop under light/normal acceleration. It only occurs about half a second when taking off. Problem sometimes occurs in park but it's much harder to replicate than when it's in drive. Also sometimes it is steady around 1000-1500 RPM. Problem also occurs sometime when hitting bumps around 25 mph.





Thoughts? I think it might be a pulley, but it is very faint and intermittent. This has been happening for about 5 months and symptoms haven't gotten any worse.





Thanks!