So I'm visiting the inlaws for the holidays. And my father in laws 1988 FJ62 has this ticking/ racheting sound which increases in frequency as you accelerate. It doesn't tick at idle. If you let off the throttle it goes away. This only happens in drive. And doesn't go away as engine warms up. What do you fine folks think is the cause?
Edit: sound seems to be coming from the engine bay
Edit: sound seems to be coming from the engine bay
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