Nexus Chassis noise

DrewE mentions this and I support his comment. I have read a rare few complaints over the years where modifying (stretching) the wheel base effecting the length of the drive shaft was the culprit. The change in length of the drive-shaft requires it to be rebalanced. The "Ford approved" company that modified the wheel base either over-looked or improperly balanced the drive shaft. Some drive shafts get quite long and segmented, making them very sensitive to being out of balance. If not balanced right, vibration and/or other strange noises are generated. One thing certain, you do NOT want to ignore it.