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During constant (but not drastic) acceleration, I get a
low-pitched rumble from the rear end when the xmission
hits its final shift point, about 45-50 mph. It lasts
1-2 seconds.
Anyone with similar simptoms that can venture a guess?
I've started to hear some kind of humming coming from underneath. Its not a constant humm, only at certain RPM's and speeds. Weird
Big Mick
1997 Expedition XLT
K&N Air Intake
Hellwig Anti sway bar
Flow master
Plus extra mods.....
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=1440&.jpg
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