Rob Agnew wrote:
> I'm posting this for a friend. The truck is a 93 4x4 club, auto, V8 with
> about 80,000 miles. Everything is stock. Recently it has developed a heavy
> knock, but it is intermittent. Doesn't have to be under load to knock.
>
> He's tried high octane fuel, it doesn't help, there are no computer codes
> generated (will knock on 92).
>
May be loose torque converter bolts or a cracked flexplate(flywheel)
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