Help! I have a 99 Tacoma 4x4 4.0L 5spd w/ 85K miles. I have had no previous problems. After my wife drove it for 3 days while I was away (not blaming her at all) I returned to find that it is making a very, very powerful rumbling noise that seems to be caused by a vibration in the drive train. It happens only when moving, and mostly while accelerating, but is also evident when coasting to a stop in neutral. At first, I thought the noise was coming from a semi truck next to me on the highway (it sounds a bit like a far-off prop plane). I can feel it through the steering wheel, but I really don't think it has anything to do with tires or suspension. Any help pointing me in the directions of things to check would be appreciated.
99 Tacoma Vibration
Sep 25, 2004
2 Replies
Block the wheels, e-brake off, tranny in neutral, climb under the truck and grab the various parts of the drive shaft and feel for play. Check the u-joints, center bearing, CV joint, slip yoke and the pinon and t-case flanges. If you feel any side-side or up-down play, that is likely the cause. Grease up the various joints and see if that helps.
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