A friend of mine has a '93 Explorer 4x4 with an automatic. He's getting an intermittent shake at highway speeds. Apparently the problem has been going on for a few months now. I took it for a test drive today, and it feels similar to driving on rumble strips. It shakes in both 2wd and 4wd, but he says it seems worse in 4wd. The vibration feels more like it's coming through the seat than the steering wheel. The vibration will go away if you take the foot off of the accelerator, or if you pull it down into Drive. He's got about 220K miles on it. The previous owner said the transmission was rebuilt about 30K miles ago, but who knows. Has anyone had a similar problem? Any ideas? He's had it in the shop for a couple of days, and they've checked the usual suspects - u-joints, ball joints, and the sort.
Thanks in advance.
Thanks in advance.
