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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 02-19-2013, 01:04 AM   #1
Mpowder
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Join Date: Feb 2013
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Unhappy Subframe reinforcement issue - replacing bushings

As the car is getting older it seems logical to replace all of the bushings in the rear suspension (there are 19 total), which is especially true if you are pulling the subframe out to do the floor reinforcement. That's what I'm planning to do in a couple of weeks.

The question is whether I should use OEM parts or upgrade those to aftermarket urethane (for track/street use)? The second option turns out to be quite expensive. E.g. Turnermotorsport offer their kit at $900. That's too much for a pair of rubber mounts, isn't it? Should I go with it or seek for less expensive options? Thank you!
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Old 02-19-2013, 07:04 AM   #2
wscottl
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When I do mine this summer it will be with AKG subframe and diff mounts, I already did the trailing arms. I've used AKG on a few E30s and have always been impressed.

BMW E46 Suspension/Bushings
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Old 04-17-2013, 08:05 PM   #3
Eisenheim
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I used Poly Powerflex bushings. I like them, but I also did a lot more to the subframe than just bushings. Here's my repair thread http://forum.e46fanatics.com/showthread.php?t=965528
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Old 04-18-2013, 05:14 PM   #4
PITT M3 RR
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2nd akg...good stuff there.
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UUC SSK / AFE STG1 Intake / AKG Red Motor mounts / AKG Red Tranny mounts / AKG Red Subframe bushings / AKG Red Differential bushings / AKG Red RTABS / TMS Subframe reinforcement / Custom in trunk subframe structural brace / Bilstein PSS10's / Ground control camber plates / Turner RSM
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Old 04-26-2013, 11:41 PM   #5
m3comp06
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Subframe reinforcement issue - replacing bushings

If i decide to go only with

The front lower control arm firstly?

is it good? or you have absolutely to change all the bushings??
I want change mine to upgraded the handling only. There no issue with the current bush.




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Old 04-28-2013, 04:42 PM   #6
Eisenheim
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Quote:
Originally Posted by m3comp06 View Post
If i decide to go only with

The front lower control arm firstly?

is it good? or you have absolutely to change all the bushings??
I want change mine to upgraded the handling only. There no issue with the current bush.




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If you're going to drop the subframe, you might as well do them all. Diff, Subframe and RTABs.
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Old 05-06-2013, 10:00 AM   #7
Mpowder
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I ended up mostly with OEM parts and added a few powerflex items.

Here's the list of the stock parts with #'s in case someone will have to go through the same thing:
Rear Inner Control Arm Bushings (upper 33 32 1 092 247 and lower 33 32 6 770 824)
Rear Outer Control Arm Bushings (upper and lower) (33 32 6 775 551)
Differential mounts (33 17 2 282 484 and 33 11 2 282 482)
Rear subframe mounts (33 31 2 283 573, 33 31 2 283 574, and 33 31 2 283 419 x 2)

On top of that I used urethane FCAB and RTAB (by powerflex)



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Old 05-07-2013, 02:20 AM   #8
Mpowder
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By the way, one should keep in mind that rear differential mounts are integrated into the aluminum differential cover and are not sold separately (in case you go with OEM parts)

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Old 05-07-2013, 06:50 AM   #9
Eisenheim
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make sure when you replace the RTABS to grease them up VERY generously. I have UUC ones, and the shop didnt put enough grease on them....they squeeked like hell for the first two weaks. It's gone away mostly, but every now and again theyll squeek. I have the powerflex diff and subframe bushing aswell, although mine are yellow. I cant remember exactly what flavor of ones I bought. Ill look again.
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Old 05-07-2013, 08:59 AM   #10
cosmos///m3
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Last month I just finished up my off season 'overhaul'. I am expecting an increase in NVH :shifty: here are a list of the recent parts that I have installed while she has been up on jack stands...

- AKG Rear Subframe Reinforcement Kit
- Vibra Technics road Motor Mounts
- AKG 75D Differential Bushings
- AKG 75D FCABs
- AKG 75D Rear Subframe Bushings
- AKG 75D RTABs
- AKG Spherical Bearing RSMs + Reinforcement Plates
- TCK SA Coilovers (500/600) + BW adjustable tie rods

Oh and I also went ahead and upgraded to SS Clutch Cable + SS Brake Lines. As you can see I went with AKG on everything, replaced my RE RSMs & Powerflex RTABs I had previously installed. Overall the quality & service at AKG is top notch Now in a few months I need to decide on new rotors
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