beedunkn

I bought a used 1999 LS400 in July 2007. It had 68k on it and ran like a champ. I do not have the maintenance/repair manual so I don't know the maintenance schedule for the car. I am a commuter and drive about 30 miles to work daily. i now have 112k on the car and know it needs some maintenance. I changed the water pump and timing belt at 96k. What else should I be aware of in terms of scheduled maintenance?

I actually joined this forum for this problem exactly! I've got a 1999 LS400 with 112k. My vibration occurs exactly like yours does. I've changed plugs and tires (running Michelin Primacy now) and still hear the rumble. It is irritating on the road! I did not chage wires however. Does anyone think the wires could be the culprit?