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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 12-09-2012, 06:27 PM   #1
Mctwist77
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Join Date: Apr 2010
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My Ride: '99' BMW 323i
Took a stab at solving shift clunk but no sucess. Pics and Videos!

So I wanted to solve the clunk I have in my 323i when I am shifting. My rear differential mount has a slight tear but it doesnt have any play and it doesnt make noise when the drive line is engaged. So I went ahead and replaced my guibo and transmission mounts, I was going to do the CSB but it looked brand new so I left it alone. Pics on guibo:



While I was under my car I realized I had some driveline slop, nothing too extreme but when I twisted the drive live back in forth I recreated the clunk! It sounds like it is coming from the right rear axle where it meets the differential. Here is the video. Let me know if you have any input as to what it could be. As far as replacing the tranny mounts and guibo, the car feels a little tighter and the clunk occurs a little less often but its still there. Also my motor mounts appear to be in good shape as well.

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Old 12-09-2012, 06:28 PM   #2
Mctwist77
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Sorry for the shitty video quality, I was trying to rotate the driveshaft and flim at the same time.
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Old 12-10-2012, 05:22 AM   #3
Chris C
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I can't really tell from you video. But I had a knock when I used to shift. I thought it was the guibo and replaced it and still had the knock. It turned out that the rear differential mount was getting squashed when I shifted and the differential would rotate and hit the bottom of the car. After the differential mount was replaced the car shifted beautifully...
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Old 12-10-2012, 10:10 AM   #4
Mctwist77
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Oh okay, guess Ill have to go back and look at it again. You're talking about the big one in the back, right?
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Old 12-14-2012, 06:00 PM   #5
Chris C
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I apologize for the delay. But yeah, the big one in the back. My car had about 190K miles on at the time and the mount was on tight. Good luck.
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