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Old 05-09-2010, 02:22 PM   #1
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Bad CLUNKING

Hey guys i havent been on here for a while. i blew up my 4 cyl YJ couple weeks ago, so i sold it and bought a new YJ!

My new YJ is a 6cyl, TF999 auto, 35" Baja Claws, 6" lift spring over axle conversion, 4.56, etc.

Here's my problem: when i bought the jeep the guy made it known that the rear end needed to be replaced because he chipped a few teeth off and i have a Ford 8.8 im going to put in it. HOWEVER, now that i've got it towed to my place, i decided to crawl it around the corner and asses how bad it was. Well there is definitely a bad CLUNK CLUNK CLUNK when i get up to about 10 MPH and it will quiet down some, then start again, then on deceleration, it will get louder. the thing about it is tho, it sounds like the clunking is coming from directly below me, not all the way back in the rear end. is this a tranny problem?

Heres another reason i think it is a tranny problem: The guy that towed it used a dolly, but he didnt remove the driveshaft. he had the drivetrain in neutral. Well when he dropped it off and left, i noticed that ATF was ALL OVER THE BOTTOM of the jeep. i mean EVERYWHERE.

any ideas? im starting to think its not even the rear end. im taking it to my buddy tmrw that was going to put the 4.56's in the 8.8 and im going to have him take a real good look at the entire jeep.

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Old 05-09-2010, 02:28 PM   #2
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oh here's a few photos of my new beast


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Old 05-09-2010, 02:36 PM   #3
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Old 05-09-2010, 03:27 PM   #4
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Sounds like a drive shaft issue. The atf splatter is more than likley due to the fact it got hot because he towed it with the drive shaft still connected and just in nuetral. The reason this is bad is because the pump is not running keeping the fluid flowing, so it does not cool. Short distances is ok but if it was a long tow and at cruising speed it got hot, expanded and either came out the breather or out the output shaft. This can also wipe the tranny out. Great looking jy!
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Old 05-10-2010, 12:34 AM   #5
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hey man i appreciate the compliment. just what i was thinking; it got hot/spilled out the breather because i cant find a crack and tranny and transfer case seem fine. it drives fine and the 4wd locks up great in 4H and 4L.

and yes i think now that it is a driveshaft issue because on my other YJ, my front driveshaft was off a little bit and when i was in 4wd it made the same sound. especially because it only happens really when there is torque on the drivetrain. i will see what my buddy says and if there is nothing messed up in the rear end then the Dana 35 is staying in there lol im running low on cash because i paid $4500 cash money on this and i had it towed for $300 lol
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Old 05-10-2010, 12:42 AM   #6
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Well first off you should be able to put the t-case in neutral, leave the tranny in park and not have to pull the shaft out to keep from wrecking the tranny. Second to find out if it is chipped teeth on the ring and pinion all you have to do is jerk the diff cover off and look at the teeth. It takes like 10 minutes at the most.

Nice YJ BTW. And that is one heck of a front bumper.
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Old 05-10-2010, 12:48 AM   #7
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lol thx i like my bumper too haha. ima fit a nice Warn in there in a couple of days. i will pull the diff cover at my buddy's house, just trying to see if anybody has had the same problem now.


BTW, anybody got a Warn for sale?
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Old 05-10-2010, 12:54 AM   #8
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Quote:
Originally Posted by beefmobile View Post
lol thx i like my bumper too haha. ima fit a nice Warn in there in a couple of days. i will pull the diff cover at my buddy's house, just trying to see if anybody has had the same problem now.


BTW, anybody got a Warn for sale?
You could mow a forest down with that thing and only be missing a bit of paint. LOL. But I like it. A little wide but still cool.

Naw, when my D35 went it was spider gears, and they ended up resting on the bottom of the diff in pieces.

Just put yours up on stands with the cover off and have yer bud rotate one of the tires with the t-case in neutral and the front tires chocked. Then observe the teeth.
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Old 05-10-2010, 12:57 AM   #9
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my buddy is a for real mechanic and put my 4.10's in my mustang, i really trust him. hes more my mechanic than my buddy lol but he is just really nice. i usually turn all my own wrenches but when it comes to 4wd and gears, he's my guy 100% lol. i will update the status tmrw if he has a little time to look at it. im really hoping its a low $$ issue lol
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Old 05-11-2010, 11:12 AM   #10
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Well it's not a driveshaft issue. i took a good look at it, yanked it around, replaced the rear U-joint. Still got that unforgiving clunk in the back so its gotta be the rear gears. my buddy is coming to pick it up in a little bit. getting a great deal.

for fabricating and installing the 8.8+$140 install kit+4.56 gears+install kit+installing the gears+towing it 60 miles.....he said $800

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1990 YJ- 6" Lift, 35" Baja Claws, 4.56, Cam, etc
1993 Wrangler- Dead
2006 Mustang- Cammed, Slammed, And fully bolted

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