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Rear Differential Bushings----A call to all vendors!!!!
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06-07-2010, 12:48 PM | #1 |
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Rear Differential Bushings----A call to all vendors!!!!
So after doing the rear subframe bushings, I couldn't help but notice another soft spot in the E9x drivetrain. The OEM bushings holding the Diff to the subframe are very soft.
Many other sports cars benefit from stiffer bushings for differentials, so why don't we? Does anybody know if the diff bushings are much stiffer for the M3? Here's some parts numbers off of REALOEM.com 33176760287 OEM 335i bushing- Front (2) 33176770866 OEM 335i bushing- Rear 33312283019 OEM M3 Bushing- Front (2) 33312283384 OEM M3 Bushing -Rear If nobody has tried this...I might have to give it a whirl! This might become a mod that goes hand-in-hand with subframe bushings! |
06-07-2010, 01:48 PM | #2 |
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Good point, what about the engine mounts? If i'm correct the M3 has more stiff / stronger mounts....
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06-07-2010, 03:20 PM | #3 |
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Check Turner MS.
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06-07-2010, 03:32 PM | #4 |
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Turner has solid mounts for the previous generation BMWs ...unless I am blind and missed them.
I'm surprised nodoby's tried doing these...for $80, really surprising. Edit: I did find them on TMS...however they're full solid. I'm not sure how that would be?! Last edited by BrianMN; 06-07-2010 at 03:47 PM.. |
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06-07-2010, 05:21 PM | #5 |
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Do you have experience with changing the rear drivetrain bushings on other cars?
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06-08-2010, 07:57 AM | #7 |
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hmm cool... tommorow my m3 conversion will be ready including a LSD. I first would like to experience that change before defining next steps.
Altough somebody outside this forum told me to have a look at the engine mounts, they could get high wear upon increasing engine HP/Tq. What's your opinion?
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06-08-2010, 10:02 AM | #8 |
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Offhand I think I remember the M3 & 335 diff bushings being the same. Harold/HPA would know for certain.
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06-08-2010, 10:16 AM | #9 |
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06-08-2010, 10:17 AM | #10 |
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06-08-2010, 08:16 PM | #11 |
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Make that Kevin/AKM would know...
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07-22-2012, 04:40 PM | #12 |
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Bringing back on old thread of yours Brian:
Did you ever swap out your differential bushings with M3 ones?
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07-23-2012, 09:19 PM | #13 |
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I'm curious about this too. Getting a LSD installed soon. Having trouble finding any posts from people who've installed upgraded rear differential bushings. Not sure if the M3 ones are compatible and if anyone's had any serious NVH issues?
This is my daily driver. I do like a sporty, slightly aggressive ride, but I don't want to go too far. In general, I've been pretty happy with the sport package suspension. I don't mind firming up the rear diff but looking at Turner's solid delrin bushings, those look a little too scary for me. |
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07-23-2012, 10:04 PM | #15 |
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Two reliable sources have told me they don't think the M3 differential bushings will reduce deflection very much v. oe and both suggest Powerflex poly bushes. Two other forum members who have the delrin differential bushings say NVH barely increased v. two members who have Powerflex poly bushes, who both note an increase in NVH. Would love to hear from anyone who's swapped in the M3 diff bushes, even though it appears some M3 owners are swapping their diff bushings out for aftermarket and don't have the torque of a tuned 335i.
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07-23-2012, 10:07 PM | #16 | |
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No huge difference in NVH=what? Would you please elaborate on the difference in NVH?
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07-24-2012, 11:10 AM | #17 |
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Gear whine in the 3k rpm range WILL be noticable with stiffer differential bushings. But not everyone is similarly sensitive when it comes to noises. Some get mad with them, others ("because racecar" ) don't care much.
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07-24-2012, 11:20 AM | #18 |
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I was referring to you in a previous post as one of the users of poly diff bushings who's experienced in increase in NVH
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
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07-24-2012, 01:54 PM | #19 | |
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Drives: '08 E92 335i
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Can you clarify? |
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07-24-2012, 03:49 PM | #20 | |
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Quote:
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07-24-2012, 04:51 PM | #21 |
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I get a whining sound too when going off throttle. M3 subframe with OEM diff bushing.
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