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Old 04-28-2013, 10:44 AM   #1
matty.dc
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drive line clunk

The other day I backed out of my driveway, pit the car in first and took off. After rolling about 10ft I heard a clunk coming from the driveshaft tunnel/ rear of the car. I immediately put the car in reverse and it made the clunk again after about 10ft of rolling. After a couple times back and forth I decided nothing was going to blow up so I took it out anyways. It also will make this noise if I coast with the clutch in for a dew seconds and re-engage almost as if it makes the noise everytime there is load and when it's unloaded.

Any ideas?
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Old 04-28-2013, 12:11 PM   #2
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Not sure about the 10 feet part, but driveline clunks in E30s are usually associated with load/unload of guibo and/or CSB.

I changed my guibo last week, will do CSB next week, already much better. $100 and a few hours and it feels fresh again. I suggest you do the same to yours.
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Old 04-28-2013, 12:35 PM   #3
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The csb is brand new and the Guido looked pretty good but I'll take it off the ground and check it out.
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Old 04-28-2013, 02:09 PM   #4
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Okay, that makes the potential causes more expensive.

Mind you, when you put the CSB on, did you pre-load it? If you just attached it in rest position, it'll die really quickly.

Moving on from that, it may be your differential, or perhaps even something loose with your brakes (my dust shield broke off partially, was clunking a lot too)
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Old 04-28-2013, 03:09 PM   #5
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check u-joints
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Old 04-28-2013, 10:30 PM   #6
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It's an e30......
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Old 04-29-2013, 05:49 AM   #7
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Quote:
Originally Posted by Yamahammer View Post
It's an e30......
Haha... Yes it is. On a positive note. I believe I found the culprit. The driver side trailing arm bushings were absolutely gone. One of the bolts had lost a nut and it had about 1/2" of play. Yikes!
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Old 04-29-2013, 09:04 AM   #8
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Well that is no good! that could be dangerous. Take better care of your car!
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Old 04-29-2013, 10:37 AM   #9
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Quote:
Originally Posted by matty.dc View Post
Haha... Yes it is. On a positive note. I believe I found the culprit. The driver side trailing arm bushings were absolutely gone. One of the bolts had lost a nut and it had about 1/2" of play. Yikes!
Ouch--good thing you found it. Kind of weird it should only clunk after 10ft though...
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Old 04-29-2013, 11:00 AM   #10
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Quote:
Originally Posted by Yamahammer View Post
Well that is no good! that could be dangerous. Take better care of your car!

I must have been too consumed already by swapping the s52 in there.
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Old 04-29-2013, 06:58 PM   #11
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Wouldn't you know it... The bolt that had the missing nut is just ignorant to remove! Just about out now after drilling through both side of the bolt since there is no room to cut it.
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Old 04-29-2013, 08:06 PM   #12
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Wouldn't you know it... The bolt that had the missing nut is just ignorant to remove! Just about out now after drilling through both side of the bolt since there is no room to cut it.
Welcome to the realm of E30 bolt replacement; a little bizarre that it should be missing a nut, I hope that's all that was wrong!
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Old 04-29-2013, 08:15 PM   #13
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Lol e30 self protection -- the nut falls off and the bolt rusts in place :p
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Old 05-01-2013, 09:22 AM   #14
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Just drop the rear subframe and do it all properly. If your running a bit of power you don't want a rear end that's as compliant as the swing set in your backyard.
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Old 05-01-2013, 05:48 PM   #15
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Quote:
Originally Posted by Yamahammer View Post
Just drop the rear subframe and do it all properly. If your running a bit of power you don't want a rear end that's as compliant as the swing set in your backyard.
Yup....The next thing on the list is the subframe and diff bushings....urethane it up.
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