I'm trying to find how to make a guitar sound that modest mouse used a lot on their The Lonesome Crowded West album. The sound is all over the album but you can find it on trailer trash right after the 5:00 minute mark and on shit luck at about :20 and throughout the song.

At first I thought it might be a harmonic+wammy bar but the guitar Isaac is using live doesn't have a whammy. So if anyone has a technique they use I'd love to hear it.