Question about Ford F-350

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Rear end on f-350 makes roaring noise. I checked oil level and it was ok. The oil seems to be very thin. Could wrong oil cause rear end noise?

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Differential roaring noise is usually caused by a bearing that is worn or has pitting in the bearing race (half of bearing without rollers). A whining noise would be caused by worn ring and pinion gears. the roaring could be from the carrier bearings (two bearings holding the differential case to the axle housing) or fron the pinion bearings. The fluid is typically heavier but will seem thin when hot. The fluid isn't the causing of the noise but if the wrong fluid is in the differntial it could have caused the bearing to go bad which then causes the noise. good luck.

Posted on Apr 05, 2011

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Posted on Jan 02, 2017

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3 Answers

1995 ford f150 both drums have small metal dust has play in rear end and sounds grinding on both sides wheel bearing or gear bearing what to do


It sounds like it could be in the rear diff not the bearings normally they make a roaring noise. Have you tried cleaning and adjusting the rear brakes. I would try that and see if it helps

Apr 16, 2015 | Ford F-150 Cars & Trucks

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2002 Suburban Roaring noise while driving only if i press pedal!


It looks like you have a defective pinion bearing which causes the load applied to the ring and pinion gears to mismatch, this causes this condition you are describing and because the hollow drive attaches to the "yoke" which is bolted directly to the end of the pinion the noise is difficult to pin point.
Your description is excellent and your observation is good too, it makes it a lot easier to answer.
The leak at the "yoke" you see is reveling, the loss of rear end gear lube has caused the bearing failure and almost without exception all of these cases have had this leak.
The solution is to locate a complete rear end and swap them out, for a 2002 car it is cost prohibitive to replace the ring gear, pinion and bearing set plus labor.
These rear ends seldom fail so your chances of getting a bad one is slim. Last one I bought was about 200 bucks, they are worth much more but the salvage yard is probably full of them.
You could have a center carrier bearing failure in the transfer case but based on your description it is unlikely.
I have some advice,; it is dangerous to drive this vehicle in this condition because at some point it will fail and could cause an accident harming you and others.
Even though the fluids are full, it probably became low enough at one time to start the damage that led to where you are now.
So based on your description, this is the most likely solution.
Let someone verify it for you, it's really not that big a deal. Good luck...
Gabe

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1 Answer

We experience a lot of road noise in our 2007 RX 350. Very loud, rear passengers complain particularly. We put on new top of the line Toyota tires 235/55R 18's. Still emits a high pitched roaring from...


I had the same problem with my 2007 RX350. Had the tires replaced under warranty because of this roaring noise and still had the same problem. Replaced the original equipment brand tires with a set of new michelins and the noise went away. This was 10,000 miles ago.

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1 Answer

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Check oil level in differential, if OK then one of the bearings went out.

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I own a 06 chevrolet 4wd. it makes an awful roaring noise


There is a bearing, somehwere that is the most likely cause.

Does anything alter the sound, accelleration, decell, moderate turning (thinking to unload one side and load the other side of the vehicle)?

My vote would be for a bearing, and they are hard to tell until you tear the offending bearing apart...

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I have a 2004 rx330 and when I take off after about 10mph there is a constant roar sounds like the transmission is not shifting. However the tranny is shifting fine it seems to be coming from the drivers...


sounds to me like either the drive shaft axle bearing is wearing out or the rear end gear on the left side uis going out. check the rear end for gear oil level if its low that could mean your rear end is about to go out.

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Check the front and rear differential fluids. you're probably need oil in the rear.

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AC/Heat Fan runs continuously and Rear end roaring noise


Sounds like the wheel bearing on the right rear hub may be defective, that would cause the noise if the tires are ok. As far as the fan goes not sure this isn't working as designed.

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Rear end roar


I have heard of the 8.8 rear ends premeturely wearing out. Did you buy this car new or used? If you bought it used, you never know how the previous owner drove the car. Remove the rear cover and inspect the oil and gears inside. If the oil smells burnt, the rear end is most likely junk.

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