05 xterra has a strange intermittent vibration at varing speed the feel like your going over rumble strips in the road. Only does it for a few seconds and nothing seems to effect when or how often. Newly rebuilt rear end included everything inside and didn't seem to fix it. (rear end needed rebuilt reguardless)
Any thought s out there? All shafts ujoints etc are tight and appear normal. Wondering about internal to the transfer case?