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Loud Hi pitched humming comming from rear end of ram 1500. between 35 ad 50 miles an hour .only under load

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It sounds like you have pinion bearing going down by what you describe.

Posted on Dec 08, 2016

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Loud deep hum from under front end thinking its wheel bearings? What other issues should I look for. Not the brakes for sure cuz been replaced recent.


Depends on the vehicle for one thing.
Wheel bearings usually change pitch depending on if you are turning left or right.

Mar 27, 2015 | Cars & Trucks

1 Answer

Where and how to add lube into rear end of 89 jaguar xj6


Please kindly visit an expert and avoid self-service as it could damage your car.

May 23, 2013 | 1989 Jaguar XJ6

1 Answer

I have a 2005 Chevy Trailblazer and it is making a loud humming noise coming from the rear end. What could that be making the noise?


ok it could be two things. it could be rear wheel bearings or a rear diff. If its a high pitch wine then its worn gears in your differential. its needs serviced or replaced. If it more of a rumbling or grinding hum, coming only from one side or both) then there are bad wheel bearings.

May 03, 2011 | 2005 Chevrolet TrailBlazer

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.

Jan 21, 2011 | 2007 Lexus RX 350 FWD

1 Answer

Humming in rear


sounds like differential input bearings, drain the rear end and check for metal shavings

May 21, 2010 | 1993 Jeep Grand Cherokee

1 Answer

2004 gmc envoy 106000 miles, rear humming noise at about 50 to 55 mph. brake work was done about 4000 miles prior.


here is a list of things that cause humming from the rear busted belt on the tire, bad bearing/s on the axle/s, planetary gears, dry rear end ring and pinion gear

Jan 20, 2010 | 2004 GMC Envoy

2 Answers

Rear end is whining


When manufactured (new) the rear end gears are preloaded (tensioned) and the gears are aligned. The 80/90 weight gear lube is intended to help maintain that set of adjustments for 50 - 100 thousand miles (US cars) or 150-200 thousand miles (Japanese, German, Korean cars). Beyond the design limits, gear lube needs to be flushed out and new added. If whining continues, the gears have warn beyond design limits... and will fail. Exactly when failure will occur depends on the strain placed on the gears (racing, hard acceleration, towing, carrying heavy loads).

Summary: Whining is preload and alignment ware. Good lube and gentle driving will extend the life of the differential - but no one can predict for how long.

Oct 23, 2009 | 1997 Dodge Ram 1500 Club Cab

1 Answer

My dodge dakota 1987 squeals at 50 miles an hour


I'll BET you have window visors or rain guards!
Look at the bottom of them as you drive air will go between the door and the guards and make a very nice squealing noise.

Lugnut61

Jan 18, 2009 | 1987 Dodge Dakota

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