Question about 2004 Ford Explorer

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I have 2004 Ford Explorer with a thumping feel and sound. When I drive over 50 mph and let it coast, the thumping starts. I feels as if it's coming from the back but not sure. The check engine light is not on. This started happening when I had all the fluids changed. I've had the tires checked and are ok. The transmission shifts gears just fine. It has 128,000 miles and drives fine except that thumping noise. It feels like I'm driving over bumps in the road then goes away if I push on the brakes or gets under 40mph. Please help. Very frustrating.

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If your lucky, its just a u-joint going out.

try replacing the u-joint which connects the driveshaft to the rear end(differrential), and if that does not solve it, then have your differrential checked out (a bad differential usually wont get all the power to the wheels that its supposed to) or just have it replaced, possibly with a junked differrential form a wrecked vehicle with low miles.

Posted on Mar 26, 2011

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In my 2004 ford explorer - when I let off the gas pedal I have a thumping sound. As soon as I hit the gas pedal again it quits. When it is coasting it is thumping.


I'm not sure what you mean by "Thumping". Please explain if this thumping is engine or body related. Try to describe the symptoms with more detail. Thumping to me, could refer to a Random Misfire, Internal transmission failure, Using the 4WD while on the wrong road surface or the tires are not all the same size, a defective U-joint (in the drive-shaft), a defect inside the rear drive-axle (ring&pinion), maybe a defect in a tire (not balanced or a bubble in the side-wall or tread), wheel bearing, ball-joint, tie-rod, or a needed alignment (observe if the vehicle pulls to one side and look for irregular tire wear). Let me know, good luck.

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