Question about 1999 Dodge Ram

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Low whine while under load

I have a 1999 Dodge Ram 1500 Quad cab with the 5.9L engine, 3:90 axle and a full bed. It has about 150K miles and under load, driving down the road I have a low 'loud' whine. When I let up on the accelerator the whine goes away. The whine starts about 25-30 MPH most of the time. It doesn't increase going around corners. Could it be my center drive shaft bearing? Have any suggestions?

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  • Mud puppy Apr 28, 2009

    I am having the exact same issue in my 2001 Dodge 1500(120000 miles), I've checked out the u-joints and couldn't find anything wrong with them I do have a small amount of fluid leaking from the rear axle by the plug and at the u-joints??

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The pinion depth is incorrect in the differential. This can cause excess backlash, improper bevelled gear meshing, and permanent damage to the gear set. It can be repaired most of the time by changing the shims on the pinion to allow 0.010" more penetration o the pinion into the housing.

Posted on Nov 22, 2008

  • cyberlord8 Feb 13, 2011

    At around 140-150K it's time to adjust the rear end. Mine just started whining and needs adjusting. The gears look fine but continued driving will cause uneven wear.

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