Rear End Thump
#1
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Location: Michigan
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Year: 2000
Model: Cherokee
Engine: 4L
Rear End Thump
2000 XJ here, 248K miles. When I accelerate from a stop, I can occasionally feel a "thump" from the back end. I would compare the feeling to having something heavy in the trunk that slides backwards into the rear door when accelerating. Any ideas? I haven't really looked under the rear in a couple months, just wondering if anyone has had a similar feeling or know of any common issues related to this.
I appreciate any help!
I appreciate any help!
#3
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Year: 2000
Model: Cherokee
Engine: 4L
I'll check the leaf mounting points today. I know the springs are terrible and need replacing, which I'm sure isn't helping anything.
#4
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Year: 2000
Model: Cherokee
Engine: 4.0L
That happened with my dad's FJ Cruiser, It was shipped from the factory with a driveshaft that was a little too short (service bulletin "to be repaired only at owner's request"). Assuming this happens on both start moving and right at stop, I would check your drive shaft and make sure it is still as it should be and hasn't moved over the years. My 2000 hasn't done this yet. My leafs need replaced too, should do it this winter but will probably have to wait until summer.
#6
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I had an issue related to this, same feeling but from braking. Every time I would use enough brake power to engage the drums it would slam like the axle was moving, turned out to be worn hardware and pads, replaced them and it all went away. If it's from accelerating only it might be the u bolts too or axle wrap if you're slamming on the gas.
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#10
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Year: 1998
Model: Cherokee (XJ)
Engine: 4.0
I'm having the same issues, so I'll have to check the rear shock mounting points and driveshaft. It does it mostly after braking to a stop and hitting the gas to get moving. It feels like the axle is moving and binding or the driveshaft. Left rear brake is very grabby, so that could be making it worse.
#13
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Year: 2000
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I wasn't aware that there was so much clearance between the splines. I'll check it out this weekend. Is there a more convenient end to remove? (I have never looked at it so I may be asking something obvious here)
#14
Anti seize is for non moving parts like nuts and bolts that are subject to rusting thus making them hard to remove. Use a grease made for chassi and driveline.
Last edited by speeddrive1; 11-04-2014 at 10:52 AM.
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It's a slip joint. Disconnect the driveshaft @ the rear axle, tape up the bearing caps if you need to. Then cut the metal clamps around the rubber bellows and pull the driveshaft straight back. Have someone or something catch the front when it drops.
Folks report anti seize lasts longer than grease, that's why you see it recommended even though it's a nonstandard use.
Folks report anti seize lasts longer than grease, that's why you see it recommended even though it's a nonstandard use.
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