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      08-26-2014, 09:21 PM   #1
Nugget
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Diff Bushings

I currently have the DEFIV Lockdown kit which consists of solid aluminium bushings as well as adding a fourth link. Pic to illustrate.






Combined with M3 subframe bushings and a wavetrac LSD I get a lot of noise both whining and clunks. Plus it hasn't completely cured axle tramp which was it's purpose, so I'm thinking the trade off in noise is not worth it for me.

Weighing up my other options and looking for opinions and experiences from others.


Some of the options:

-OE replacement.
Probably too soft, and what is the part number for the rear bushing?
http://www.ecstuning.com/BMW-E82-135...ntial/ES56748/


-M3 spec.
Might be a good compromise, again what is the part number for the rear bushing?
http://www.ecstuning.com/BMW-E82-135...ial/ES1844489/

-Powerflex.
Has anyone used these?
http://www.ecstuning.com/BMW-E82-135...ial/ES2651223/
http://www.ecstuning.com/BMW-E82-135...ial/ES2651068/

-Powerflex race.
I have a feeling these will probably be just as noisy as the solid bushings.
http://www.ecstuning.com/BMW-E82-135...ial/ES2651070/
http://www.ecstuning.com/BMW-E82-135...ial/ES2650111/

What other options have people used and would recommend?
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      08-26-2014, 10:15 PM   #2
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My car has full solid bushings.

Diff bushings induce a lot of noise and you can experience different results based on the different combinations of bushings.

I suggest going back to OEM Diff bushings and instead change your M3 subframe bushings to solid aluminum subframe bushings. This will tighten the rear end significantly and not introduce too much noise and vibration.
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      08-26-2014, 10:20 PM   #3
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I thought someone might suggest that, it's not a bad idea but I cbf changing subframe bushings again.
What solid bushings are you using?
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      08-26-2014, 10:28 PM   #4
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Quote:
Originally Posted by Nugget View Post
I thought someone might suggest that, it's not a bad idea but I cbf changing subframe bushings again.
What solid bushings are you using?
Turner Motorsport solid aluminum. The simplest options is remove the solid diff bushings to cut the diff wine and vibration and just go OEM. But if you want to lock the rear end with minimal noise and vibration, solid subframing is the way to go.
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      08-26-2014, 10:30 PM   #5
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here is my subframe




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      08-26-2014, 10:32 PM   #6
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Funny you should say that I was just on the Turner website.
http://www.turnermotorsport.com/BMW-...nd-mounts.aspx

I'll take your suggestion on board.
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      08-27-2014, 06:04 AM   #7
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I'm just about to wack a set of these in...softer than the power flex but stiffer than the oem

http://www.nolathane.com.au/product_...t_number=49204
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      08-27-2014, 12:32 PM   #8
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Quote:
Originally Posted by ilikebmxbikes View Post
here is my subframe




What are the 2 green bars? Are they anti roll bars?
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      08-27-2014, 07:05 PM   #9
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Quote:
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What are the 2 green bars? Are they anti roll bars?
Yes, but one of them is the front swaybar just laying on top of the subframe assembly.
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      08-27-2014, 07:17 PM   #10
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Sorry to thread jack, but has anyone DIYed the solid aluminum subframe bushing? I'm interested in knowing whether all four of the Turner aluminum bushings install from the bottom up like the 135i bushings, or are they like the M3 bushings where the fronts install from the top down. The guy who answered the phone at Turner couldn't answer that question.

Looking at the picture above, it appears the delrin bushings install like the M3 bushings.
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      08-27-2014, 08:18 PM   #11
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Quote:
Originally Posted by c0ris07 View Post
I'm just about to wack a set of these in...softer than the power flex but stiffer than the oem

http://www.nolathane.com.au/product_...t_number=49204
So it's just the two bushings?
Interested to hear your impressions.
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      08-27-2014, 09:11 PM   #12
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Quote:
Originally Posted by Pig Farmer View Post
Yes, but one of them is the front swaybar just laying on top of the subframe assembly.
HA, I was like what is going on here lol
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      08-29-2014, 05:46 AM   #13
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Whiteline/prothane/Nolathane Subframe bushes get good reviews for cars with Diff lock kit
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      08-31-2014, 08:50 PM   #14
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Quote:
Originally Posted by andrey_gta View Post
Whiteline/prothane/Nolathane Subframe bushes get good reviews for cars with Diff lock kit
Are those firmer than the M3 ones?
If I was going to switch subframe bushings again I would probably do the solid ones and go back to stock diff bushings as suggested above.

I'm more interested to see if anyone has experience with diff bushings that are somewhere between solid ones and the stock ones in terms of frimness.
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      08-31-2014, 10:08 PM   #15
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Quote:
Originally Posted by Nugget View Post
So it's just the two bushings?
Interested to hear your impressions.
I believe its 3 bushings? 2 small and a big one, haven't had a good look as I'm still waiting for my diff to arrive.

I'll let you know when there in
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      Yesterday, 01:14 AM   #16
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Luke. I am running Whiteline ones at the moment, they seem to be fine. Firmer than stock and I haven't noticed any dramatic increase in noise.

I got the subframe and diff bushes changed by Josh.
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      Yesterday, 08:02 PM   #17
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Quote:
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Luke. I am running Whiteline ones at the moment, they seem to be fine. Firmer than stock and I haven't noticed any dramatic increase in noise.

I got the subframe and diff bushes changed by Josh.
Sounds good. Where did you get them from?
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      Yesterday, 08:50 PM   #18
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Quote:
Originally Posted by Nugget View Post
Are those firmer than the M3 ones?
If I was going to switch subframe bushings again I would probably do the solid ones and go back to stock diff bushings as suggested above.

I'm more interested to see if anyone has experience with diff bushings that are somewhere between solid ones and the stock ones in terms of frimness.
I would say maybe softer than m3 because people complain about them less, esp with Diff lockdowns

You may be better off swappign Diff busheing to something Poly, sae:
Powerflex, and Powerflex Black
Nolathane/prothane/whiteline( same brand, nolathane cheapest)
Strongflex.eu ( polish & Cheap)
SuperPro - Australian Powerflex style brand - lots of kits, simmilar price
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      Yesterday, 09:09 PM   #19
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Quote:
Originally Posted by andrey_gta View Post
I would say maybe softer than m3 because people complain about them less, esp with Diff lockdowns

You may be better off swappign Diff busheing to something Poly, sae:
Powerflex, and Powerflex Black
Nolathane/prothane/whiteline( same brand, nolathane cheapest)
Strongflex.eu ( polish & Cheap)
SuperPro - Australian Powerflex style brand - lots of kits, simmilar price
Thanks, I think I am going to give whiteline diff bushings and switching to the heavier Motul 75w-140 a try.
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      Today, 04:10 AM   #20
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Quote:
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Sounds good. Where did you get them from?
Josh ordered them in for me. He was the best price.
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