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post #1 of 21 (permalink) Old 10-12-2005, 04:55 PM Thread Starter
 
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big problem, need answer quick

When I start driving, I feel a clunk and vibration. I believe its coming from the rear passenger side. I'm trying to figure out what it is, and how much its gonna cost me to repair it. It vibrates/rocks the car alittle while driving, and i can hear it clunk when I start driving sometimes. Could it be one of the symptoms below?

differantial Bushing?
wheel bearings?
Ujoint?

anyone know the pricing to get them replaced if its one of those?
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post #2 of 21 (permalink) Old 10-12-2005, 05:27 PM Thread Starter
 
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ok, I heard that the birds dont have U-joints, and that its a CV thing.
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post #3 of 21 (permalink) Old 10-12-2005, 05:46 PM
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there are u joints, but they are on the drive shaft.. on the axle shafts they are constant velocity joints.

As for your clunk, I would make sure everything is tight in the back and your ujoints are in good shape

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post #4 of 21 (permalink) Old 10-12-2005, 05:53 PM Thread Starter
 
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well, les schwab said its 178 installed for the cv joints. But they are gonna inspect it tomorrow while I'm at work. The only thing about having it fixed though, is that it takes money away from my xbox360 savings..

But i get payed 3 times this month, so the last check is going right back in, so I guess it wont be too bad
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post #5 of 21 (permalink) Old 10-12-2005, 06:39 PM
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could be the u-joint, either of the cv axles, the differential mounts, sway bar links. The wheel bearing shouldnt clunk on acceleration, it would be more of a squeeling or grinding around corners.
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post #6 of 21 (permalink) Old 10-12-2005, 08:10 PM
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The rubber spring isolators in the rear was the cause of my clunk.

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post #7 of 21 (permalink) Old 10-12-2005, 08:29 PM Thread Starter
 
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but the vibrating has been getting worse over time, which is why I think it may be the CV or U joint
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post #8 of 21 (permalink) Old 10-12-2005, 09:35 PM
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A bad u-joint will clunk when you first put it in gear. If you let it go past that then it starts vibrating as the drive shaft becomes unbalanced.
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post #9 of 21 (permalink) Old 10-12-2005, 10:02 PM Thread Starter
 
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it doesnt vibrate as badly when cruising down the highway. atleast it doesnt feel as bad as when i'm going 25
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post #10 of 21 (permalink) Old 10-13-2005, 12:41 AM
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take it to a good drivetrain shop. and replace the U joints. you'll thank yourself. mine came off at the transmission at 100mph and snapped the transmission clean in half. 990 for new trans, driveshaft, and ujoints.
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post #11 of 21 (permalink) Old 10-13-2005, 05:36 PM Thread Starter
 
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Well, i got it back. They said there was nothing wrong with it. Ujoints are fine etc
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post #12 of 21 (permalink) Old 10-13-2005, 06:10 PM
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Next I'd look at the diff bushings. How do they look? And btw, I checked my driveshaft and it was rock solid but I took it out and replaced the U-joints anyway. When I took it out, the needle bearings in one of the four cups were completely gone. Just worn to powder.
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post #13 of 21 (permalink) Old 10-13-2005, 06:11 PM Thread Starter
 
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i was gonna get the diff bushings done anyway. I'm getting the ones off supercoupe performance
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post #14 of 21 (permalink) Old 10-13-2005, 07:05 PM
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wise move my friend
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post #15 of 21 (permalink) Old 10-15-2005, 11:32 PM Thread Starter
 
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so, My next things to do would be

replace differential bushings
balance tires
alignment
?

does anyone know how much it usually runs to install differential bushings?
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post #16 of 21 (permalink) Old 10-16-2005, 08:46 AM
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you can install those diff bushings yourself. all you need are a couple wrenches and a jack. just drop it down enough to get them off them bolt it back up. you dont even have to disconnect the driveshaft.
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post #17 of 21 (permalink) Old 10-16-2005, 09:07 AM
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Before you get an alignment check the rear spring isolators and see if the rubber is still there.

http://www.mn12performance.com/mn12p...-isolator.html

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post #18 of 21 (permalink) Old 06-10-2007, 01:32 AM
 
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mine makes that clunk noise only when i put it in reverse, i took it to the shop and i was told that the CV joints have slop in them...........that was a year ago.....lately at certain rpms, i believe before shiftin from 2 to 3, i hear a like woohhing noise coming from the rear....i think i def need to replace the cv joints....but who knows
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post #19 of 21 (permalink) Old 06-10-2007, 06:15 AM
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you do know this thread is 2 years old...
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post #20 of 21 (permalink) Old 06-10-2007, 08:43 PM
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I'm glad it was resurrected, actually, because I have a question relating to this. I don't get a clunk shifting from Park or between Drive and Reverse, but I do have a drive train vibration when coasting. Sometimes it's pronounced, sometimes you can barely tell.

Anyway, it's been there for a few years and I replaced the front and rear u-joints when I first started noticing it, but that didn't change anything. CV joints wouldn't cause that, would they?

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post #21 of 21 (permalink) Old 06-10-2007, 09:11 PM
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could be the driveshaft is just unbalanced in your case. may want to invest in one of those from sc performance.
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