Rear End Humming
#1
Senior Member
Thread Starter
Rear End Humming
I have been trolling this site for awhile and yesterday I finally got an F-150. It is a 2004 SuperCab 4X4 with the 5.4. It was a one owner with only 65,000 miles on it. The only problem with the truck is that there is a slight humming coming from the rear end, it only does it when going at a constant speed. As soon as I get off the gas it stops and as soon as I accelerate it stops therefore it is not the tires. It has a 3.55 open diff if that can help. Does anyone have any advice to stop it, the noise doesn't bother me I'm just afraid it may be causing damage. Thanks.
#3
I recently replaced a bad pinion bearing. I had a constant noise in the rear end whether the truck was under power or coasting in neutral. Obviously, it was more distinct in neutral.
Sounds like it only occurs under power from your post. Maybe a u-joint? Just a thought.
Sounds like it only occurs under power from your post. Maybe a u-joint? Just a thought.
#6
Senior Member
Thread Starter
#7
Senior Member
Mine does the same thing. I think its just how these trucks sound. But i also do have a constant humming that i know is the bearing. Similar sounds but yes one is only when driving at constant speeds and goes away when i either let off the throttle or accelerate while the other occurs all the time. I can feel vibration in the pedals which i believe is from the bad bearing.
Last edited by GrnMachine210; 06-17-2013 at 02:08 PM.
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#8
Senior Member
Thread Starter
Mine does the same thing. I think its just how these trucks sound. But i also do have a constant humming that i know is the bearing. Similar sounds but yes one is only when driving at constant speeds and goes away when i either let off the throttle or accelerate while the other occurs all the time. I can feel vibration in the pedals which i believe is from the bad bearing.
#9
Senior Member
#10
Senior Member
Just realized that someone mentioned it being the pinion bearing, I thought it read wheel bearing. Lol that could certainly be the cause. Man and I thought it was normal the whole time!