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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 07-01-2012, 07:18 PM   #1
bimer21
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Is my bushing causing this-->

Hi there i have my rear bushing of differential crake, sometimes when i swich gear i hear and feel a little bump coming from the back also when i accelerate hard only on first gear i feel vibration coming under the car! Also i see that the bushing or mount that joint the tranny with the car is a little crack too. And yes i check my rear subframe and its good i clean it and no cracks on chassis noting, is good! Some opinion please thanks

Last edited by bimer21; 07-01-2012 at 07:28 PM.
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Old 07-01-2012, 07:45 PM   #2
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Bump
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Old 07-01-2012, 08:27 PM   #3
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people bump their threads when it gets kicked off the first page. which in the last 27 mins from your first post it wasn't lost.

if your rear diff bushing(mount) has a crack in it yes, this could be the problem you feel. our E46s also are known to sometimes have this clunk in engagement that people replace almost their whole driveline trying to trace. but yes, if the older style bushing it will flex inside and hit it's outter casing.
so replace that diff mount.
vibration in the driveline underneath can also be from a worn guibo(aka Flex-disc) that is made of rubber. the center support bearing can also cause this. so i would inspect the Flex disc and csb. but certainly replace the rear diff mount if it has a crack and go from there.
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Old 07-01-2012, 09:07 PM   #4
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Sorry for the bump but i'm a little desperate with this! Also this start when i switch my shift linkage on thursday! I took the 3 bolt from the bar that goes from tranny to diff and there was when i see this mount with a little crack and i finish my job and tight it back on everything just like it was! Now whats the flex disc and csb? Sorry im lack of knowledge!
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Old 07-01-2012, 09:07 PM   #5
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It was not doing this before this!
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Old 07-01-2012, 09:17 PM   #6
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what do you want us to say?
do you really want us to tell you to replace them since you've already know the answer?
its like asking what to do when you run outta gas.
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Old 07-01-2012, 09:35 PM   #7
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i dont know for real i will take the piping out again and will under there what should go wrom but i dont really know what to look for! and the rear bushing of the diff i will remplace it too! but my question should i look for something in specific?
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Old 07-01-2012, 09:41 PM   #8
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I'd check your diff mounts and your transmission mounts to see if there's any cracking or separa...Oh..wait, you already did and found exactly that. What's the purpose of this thread again?
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Old 07-01-2012, 10:30 PM   #9
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Quote:
Originally Posted by bimer21 View Post
Sorry for the bump but i'm a little desperate with this! Also this start when i switch my shift linkage on thursday! I took the 3 bolt from the bar that goes from tranny to diff and there was when i see this mount with a little crack and i finish my job and tight it back on everything just like it was! Now whats the flex disc and csb? Sorry im lack of knowledge!
you need to explain this part a little better. "3 bolt from the bar that goes from the trany to diff". are you talking about the driveshaft? if so, that rubber donut thing that connects the driveshaft to the transmission is the Flex Disc(also called Guibo and sometimes Univeral Joint).
"csb" is the "center support bearing".

#1 is Flex Disc and #8 is the Center Support Bearing
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Last edited by Alex323Ci; 07-01-2012 at 10:33 PM.
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Old 07-02-2012, 06:32 AM   #10
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I am NOT gay but guy i love you so much and yes thats is was i talk about the guido or flex disc! So i thinks that my headache with this will end soon jajaj i will order that piece new to replace it thanks i will post with news
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Old 07-04-2012, 08:19 AM   #11
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After too much looking any autoparts or autozone have then and dealer cost 200$ and will take from 7-12 days to ship because they dont have in stock so i order then online from ECS 81$+tax under 100$ should be at home before next thursday!
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Old 07-04-2012, 05:53 PM   #12
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haha, glad you got it sorted out.
when doing the Guibo, it's very important to make sure the arrows point towards the flanges. otherwise you will get vibration and the guibo will break in short time. here is a fairly good DIY on it. #7 is the part i'm talking about with the arrows.
http://www.bokchoys.com/differential/diy_guibo.htm
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Old 07-04-2012, 06:58 PM   #13
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Thanks for the hint very important info! I appreciate it
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Old 07-11-2012, 06:24 PM   #14
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Work done no more shaking thanks! Here is the old one
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Old 07-11-2012, 10:28 PM   #15
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F....... Still feeling that vibration inside the car un heavy acceleration but its only until 4k but now its leas

Last edited by bimer21; 07-11-2012 at 10:31 PM.
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Old 07-12-2012, 08:20 AM   #16
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I only change the two bushings the shifter and shifter level! I did touch the flex disc and now i see that its bad! But my vibration continue! I will buy the center piece and change that too what you guys thinks?
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Old 07-16-2012, 05:16 PM   #17
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Check this out
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Old 09-06-2012, 08:49 PM   #18
bimer21
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Here i'm again with same problem! I start feeling some vibration under my car when accelerate slow in 1 and 2 gear till around 3k! And i 1 gear only when i floor it! But i went inside the car i only can see the disc flex and this one looks like new! I cant see the mid-bearing of the driver-shaft but i put this 2 new in less than 2 mounts! Some advice here now please
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