Question about 1996 Toyota T100

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VIBRATION Annoying metalic sounding vibration emanating from lower fire wall area. Prominent when accelerating when engine has been sitting awhile, warm weather or cool. Noise ebbs when engine is warmed but noise sometimes persists when I approach the 40, 60 and 80kph zones with quieter lulls between. Mechanics, on test runs suspected a loose heat shield.Others said no but offered no explanation. This has been going on since warranty expired. I suspect problem is transmission related. Any helpfulness would be greatly appreciated.

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Does the rattling occur whilst you are sitting still, and run the rpms up? Does it come in at a particular rpm, and then go away? If so, the heat shield is the problem. I see this quite a bit. If you can get it to do it at a specific rpm, have someone slide under the truck and, with a large screwdriver, pry on the front pipe and the converter shields. See if the vibration changes.

Posted on Oct 09, 2008


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