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  #13  
Old 04-21-2013, 08:27 AM
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Re: Clunk in Rear Differential

I suspect from what you have diagnosed that it is something loose. Let us know what you found this weekend!
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Old 04-21-2013, 02:13 PM
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Re: Clunk in Rear Differential

Got under the car this morning and could find nothing loose. Looked forward toward the transfer case and could see seepage from the rear seal so I'm guessing that the transfer case is low on oil. Im thinking I can change out the seal myself but not sure if there is a special lubricant for the TC and can I get something at autozone or O'reilly? I'm hoping that the clunking just turns out to be low lubrcant in the TC.
Thanks for any info!
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Old 04-21-2013, 02:54 PM
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Re: Clunk in Rear Differential

Not sure my last post went through but have determined that the probable cause of the clunk is actually low oil in the transfer case as I discovered that the rear seal is leaking. I have been all over the net trying to determine what lubricant to use in the transfer case. The Mopar only fluid turns up most often. However, in looking at my owner's manual it clearly says Dexron III trans fluid or equal so now I'm confused?!?!
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Old 04-21-2013, 06:22 PM
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Re: Clunk in Rear Differential

Since your jeep is quadra trac II, it has the NV 247 T case. This T case requires special mopar fluid, which in fact is just Mobil 424 fluid. When the WJ came out in 99, they used ATF+4 in this T case, never heard from Dexron III in here. Soon they changed to the Mobil 424 after having problems with clutch chatter.
It is quite normal to have a bit of fluid coming from the aft seal. The propellor shaft has a slip joint with the T case, this is necessary due to the travel of the suspension. Because it constantly moves a bit in and out, a bit of fluid can come out. If its leaking a lot ofcourse is not normal. Don' t know why the T case would make a clunking noise when standing still when the fluid level is low, but it wont hurt to check.
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Old 04-21-2013, 06:48 PM
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Re: Clunk in Rear Differential

Thanks Frango...I'm grasping at straws right now. There is more than a little seepage as the tailshaft of the TC is a dark brownish yellow and oil is spread out on the under carriage from the driver's side to the passenger side in about a 12" swath so there is some slinging going on. The oil in the TC, the tranny and differentials has never been changed so I'm thinking I'll get it into the shop and have that done.
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Old 04-23-2013, 07:23 AM
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Re: Clunk in Rear Differential

Just picking up on the clunk you get when at a stand still, I to have had this problem and have just ignored it since I have owned my WJ.
I will be changing out all control arm bushes and the ball joint in the rear as they are flogged out.
Will have to wait to see if that makes a difference as parts won't arrive for another 2 weeks.
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Old 04-23-2013, 09:16 AM
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Re: Clunk in Rear Differential

Worn bushings and or upper ball joint can cause clunking, especially when going over bumps. I had bad upper control arm front bushings and could feel.it a lot in the steering during highway driving, i had to correct the steering wheel constantly.
He Ipahihi, did you order new bushings, or complete.new arms? I hope.that you didn' t go with Omix ada bushings, because.the ones i changed just last less then 1 k Km. I have Dorman bushings now and i could.see the quality difference right away. The Dormans are holding up quite.nice.
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  #20  
Old 04-23-2013, 05:24 PM
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Re: Clunk in Rear Differential

Went with the new arms as pricing was marginal and the swap out will be a lot quicker. However, the postage as always was a killer.
We are not subject to import taxes in Australia unless spending over $1000.00.
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Old 05-07-2013, 07:34 PM
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Re: Clunk in Rear Differential

redhawks2 - did you ever fix your clunking noise?
I'm starting to get a clunking noise which I think is identical to what you're experiencing. I'm hoping that low transfer case fluid was the culprit.
I need to get under it next chance I get to check.
Let me know where you are with this problem.

Thanks.
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Old 05-07-2013, 08:53 PM
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Re: Clunk in Rear Differential

Hello...haven't gotten anywhere yet. At 56K miles I'm thinking I need to get all the fluids changed and there is evidence of a leak at the back of the tranny so I may have a bad seal. There is never a clunk if I shift into neutral before coming to a stop, whatever that means. The clunk is very intermittent.
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Old 05-07-2013, 08:59 PM
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Re: Clunk in Rear Differential

My clunk seems to be happening more and more. I'll try shifting it into neutral right before I stop to see if I get the same results.
Thanks for the update.
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Old 05-12-2013, 10:41 AM
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Re: Clunk in Rear Differential

Some more info to try to get to the heart of the problem-
It seems to shift a little hard into second gear and only second gear.
Those times when I really feel the clunk, is it taking off in second like Frango suggested?
Got to figure that out. Maybe drop it into first at lights and manual shift it and see what happens.
The only maintenance issue I haven't taken care of since I got my GC is to change the tranny filters. Could this be the cause? Anyone know? It has 94,000 miles on it and I have no idea if it was ever done.
Also, it doesn't do it in the morning when it's cooler. And I didn't have this problem until the weather got warmer. I bought it last November so if this problem previously existed, I wouldn't have found it on the test drive, if the problem is temperature sensitive.
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