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Go Back   E46Fanatics > Tuning & Tech > Suspension & Braking

Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 01-23-2013, 12:05 AM   #1
heechkass
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Got cracked diff bushing...what else to do while there?

Discovered that I have cracked differential bushing. Wondering what else to change while I have it apart.
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Old 01-23-2013, 12:13 AM   #2
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The rear lower control ARM brushing.
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Old 01-23-2013, 12:23 AM   #3
heechkass
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Flex disc?
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Old 01-23-2013, 12:33 AM   #4
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Flex disc?
Not unless it is bad. Would require removal of exhaust, drive shaft and heat shields.
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Old 01-23-2013, 12:43 AM   #5
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By the way, I have 155000 miles on this...to provide context
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Old 01-23-2013, 12:48 AM   #6
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Old 01-23-2013, 05:20 AM   #7
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Drop in a LSD

Seriously though, changing rear end bushings will pay off... check other stuff like sway links. If you can manage to do RTABs it would serve you well.

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Old 01-23-2013, 08:21 AM   #8
heechkass
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I'll probably focus on bushings this round and leave csb and flex disc for another time.
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Old 01-23-2013, 09:44 AM   #9
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History of diff seals?
Lots fail at much lower mileage. Cheap when you have the axles removed.
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Old 01-23-2013, 11:11 AM   #10
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History of diff seals?
Lots fail at much lower mileage. Cheap when you have the axles removed.
Diff seals is a good one.

Quote:
Originally Posted by BMWCaptain View Post
The rear lower control ARM brushing.
Upgrade to the M3 ball joint instead of another bushing here.
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Old 01-23-2013, 11:57 AM   #11
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Diff seals is a good one.

I know, mine went out at less than 90K miles.



Upgrade to the M3 ball joint instead of another bushing here.
What does that substitution look like?
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Old 01-23-2013, 09:22 PM   #12
heechkass
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History of diff seals?
Lots fail at much lower mileage. Cheap when you have the axles removed.
Less extreme temps here...
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Old 01-23-2013, 09:23 PM   #13
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^no salting in winter time.
My guess
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Old 01-23-2013, 10:18 PM   #14
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My car gets driven only in summer.
Has never seen a salted road.
I'm in LA every summer.
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Old 01-25-2013, 09:27 AM   #15
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Originally Posted by heechkass View Post
Discovered that I have cracked differential bushing. Wondering what else to change while I have it apart.
Replace every piece of suspension rubber under the car:
Diff bushings
rear subframe mounts
rear trailing arm bushings
upper and lower control arm bushings
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Old 02-02-2013, 05:09 PM   #16
heechkass
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Originally Posted by teamdfl View Post
Replace every piece of suspension rubber under the car:
Diff bushings
rear subframe mounts
rear trailing arm bushings
upper and lower control arm bushings
Sound advise. Is it easier to drop the exhaust and the whole rear axle to get all this done? Or is there a easier or better way to do this?
By the way, I was going through the list of all bushings to order and got stumped by a pair on realoem without a part number. I posted a separate tag to see if anyone can help identify it.
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Old 02-02-2013, 05:17 PM   #17
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Are you sure it is for your car on realoem? If there is no part number, good chance it isn't for your car.

Yes, big nasty job to drop the rear and exhaust.

What is an upper control arm?
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Old 02-02-2013, 11:03 PM   #18
heechkass
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Thanks stinger. Your post made me go back into realoem...and found the note that explained why the part wasn't listed.
Notes:
Items pictured but not listed are not installed on your vehicle.
Items pictured without a number are listed on another diagram.
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