Posted by David on September 02, 1999 at 06:22:16:
In Reply to: Nissan pickup tire pressure / vibration. posted by JSShackel on August 28, 1999 at 17:32:13:
At this point, with a second set of tires and the air pressure varience's you have played with it is safe to say your vibration is coming form somewhere other than your tires. A few initial areas you should look at.
1. Wheels - have you checked for any bent rims or excessive run-out(out of round). Although this problem usually can be detected at low speeds as well.
2. Drive shaft - an un balanced or out of balance drive shaft could cause this.
3. Rotors/Hubs and drums (brakes) Have you tried on vehicle balancing. This procedure balances the tire wheel assembly as well as all other components that are rotating when you drive.
4. Other suspension and steering components besides ball joints. Steering linkage - Tie rods & links , shocks etc..
5. A reach, but... Rotating/spining engine parts. Harmonic balancer etc..
Narrowing down the location of your vibration could also help your diagnostic process and help the auto service personnel solve your problem. Is the vibration coming for front or rear or both. Is the steering wheel vibrating or is it more pronounced in the seat or floor board. Can you visably see anything vibrating, the dash, steering wheel, rear view mirrow, truck bed etc..
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