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Discussion Starter · #1 ·
I use the bronco for short trips about once a week, sometimes maybe twice.

I have been noticing a vibration sound coming from the rear while on the throttle. It goes away under coast and while coasting i have revved the motor in neutral and there is no vibration.

So, only under load (throttle) do i get a vibration noise.

Also, its colder than a well diggers ass up here. The 4.56 gears in the rear have probably 10k miles on them, the entire rear was rebuilt by offroad unlimited in phx.

Does it sound like the pinion is loose or something?
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