Something's "clunking" under the jeep! - Page 2 - JeepForum.com

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post #16 of 31 Old 08-27-2012, 01:29 PM Thread Starter
cgseanp
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UHHH, So upon closer inspection on my skid plate and the picture posted in #14, my trans mount bolts are coming through that square indent right where you wrote "Trans mount bolts".. Are mine in the wrong spot? how is it even possible? Everything seemed to line up perfectly.

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post #17 of 31 Old 08-27-2012, 02:53 PM
seattle_yj
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Quote:
Originally Posted by cgseanp View Post
UHHH, So upon closer inspection on my skid plate and the picture posted in #14, my trans mount bolts are coming through that square indent right where you wrote "Trans mount bolts".. Are mine in the wrong spot? how is it even possible? Everything seemed to line up perfectly.
I think that the spot the bolts come out depend on your transmission and engine combo. Mine is an auto (32RH) and 4L.

No matter the mounting hole, you should check that
1. Yes you do have a transmount and that the bushing is in good working order and the studs are not stripped.
2. Your torque arm is in good working order and the bushings are not smashed from over tightening.
3. Your cat or parts of the exhaust are not smacking the skid plate.

I would pull the plate off and check it out. You can see where the parts are coliding with the plate because you will see a wear spot on the underside of the plate.

I have my skid plate off right now while I'm replacing the trans pan gasket to a FelPro brand, so I will try and snap some pics and post them here to see if that helps.
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post #18 of 31 Old 08-27-2012, 03:28 PM Thread Starter
cgseanp
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Thanks.. I took the skid plate off when I replaced the transmount, so I do for sure have the mount. I guess it's just in a different spot since I have a manual transmission. I didn't notice any wear on the inside of the skid plate from being hit by any moving parts. The torque arm seemed to be ok, but I didn't focus on it that much.
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post #19 of 31 Old 08-28-2012, 12:22 AM
Luuca
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Inspect your U joints. Could be that one of them is going bad and clunking your drive shaft when you start rolling.

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post #20 of 31 Old 08-28-2012, 12:48 AM
ptwhaler
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^x2..it's your u-joints. Very common problem, very easy fix.

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In water there is bacteria"
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post #21 of 31 Old 09-01-2012, 10:31 AM
cohutta20
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I have a similar rattle coming from the same area. I just got through troubleshooting it and found that the exhaust hanger at the back of the muffler is rattling. I have a 3in body lift installed and the hanger is modified. If I remember correctly, I got frustrated at not being able to get through the rusted bolts. Guess I'm going to search on here for a better repair job.....lol
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post #22 of 31 Old 09-03-2012, 09:32 AM Thread Starter
cgseanp
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With regards to u-joint, Im looking around and it some of the rear cv driveshaft u joints list different lock up sizes. How do I know what I would need?
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post #23 of 31 Old 03-02-2013, 09:15 PM
SeeWhy
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cgseanp - Did you ever figure out what the noise was? I have the same clunking. When backing up and after I let off the brakes it clunks. It really feels like it's right under my floorboard. I had a friend rock the steering wheel and couldn't find anything loose in the front-end. I haven't checked the back yet. I did find a really bad motor mount though:
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1998 Cherokee, 4.0, Auto
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Black Cragars with 31x12.50 BFG A/T's
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post #24 of 31 Old 03-02-2013, 11:11 PM
ROTTEN
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Quote:
Originally Posted by SeeWhy View Post
cgseanp - Did you ever figure out what the noise was? I have the same clunking. When backing up and after I let off the brakes it clunks. It really feels like it's right under my floorboard. I had a friend rock the steering wheel and couldn't find anything loose in the front-end. I haven't checked the back yet. I did find a really bad motor mount though:
Might be the torque arm bushings

I'm new
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post #25 of 31 Old 03-02-2013, 11:34 PM
kelzac23
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I have a tj and also have this problem? Would it be something different?
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post #26 of 31 Old 03-02-2013, 11:46 PM
ROTTEN
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Unsure. Best bet is to get underneath and start pulling and pushing on things

I'm new
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post #27 of 31 Old 03-03-2013, 08:18 PM
SeeWhy
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So I figured out what mine was. I had a buddy put it in reverse and rock the truck with the brakes and the lower control arm bushings were jacked on the body side. I found a guy on CL selling a set for $40! They're homemade and they were made for the rear of a ZJ so they were 3/4 inch longer but they worked great! No more clunking. I think the previous owner had some RE lower arms before, but these new ones are beefy!!! The bottom one is the new one.
Attached Thumbnails
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1998 Cherokee, 4.0, Auto
3 inch lift from various parts...
Black Cragars with 31x12.50 BFG A/T's
Yakima rack with tire mount
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post #28 of 31 Old 03-03-2013, 08:28 PM
ROTTEN
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Smells like tj's in here! Glad you found that bushing. I often forget about parts like that because I don't have them

I'm new
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post #29 of 31 Old 03-03-2013, 08:38 PM
SeeWhy
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LOL, I just realized this was in the YJ forum. I did a search for clunking underneath and came across this one. All the YJ's are like..."what's a control arm"? hahahaha

1998 Cherokee, 4.0, Auto
3 inch lift from various parts...
Black Cragars with 31x12.50 BFG A/T's
Yakima rack with tire mount
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post #30 of 31 Old 03-03-2013, 08:46 PM
cstone94
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Quote:
Originally Posted by SeeWhy View Post
LOL, I just realized this was in the YJ forum. I did a search for clunking underneath and came across this one. All the YJ's are like..."what's a control arm"? hahahaha
Seriously........ What is it?


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