[GreekboyD]

Lots of tuned 335d cars out there putting down tons of torque with stock tranny mounts and subframe bushings.

These are definite weak points IMO after the increased torque from tunes. Can't believe how flimsy the stock tranny mounts looked when I replaced them today with upgraded Rogue Engineering ones.

I know of Powerflex, Group N and Solid Delrin subframe upgrades.


How many of you have upgraded your tranny mounts or subframe bushings?

[supermann125]

Where did you get these mounts? I can't find any but the OEMs most websites. I'm about to do a bunch of tranny maintenance and would like to swap these out

[GreekboyD]

Originally Posted by supermann125

Where did you get these mounts? I can't find any but the OEMs most websites. I'm about to do a bunch of tranny maintenance and would like to swap these out

Here you go:

Link

[shnaggs]

Was there a increase in nvh? I thought I remember reading that these significantly increase nvh, but I could totally be off base.

[GreekboyD]

Originally Posted by shnaggs

Was there a increase in nvh? I thought I remember reading that these significantly increase nvh, but I could totally be off base.

No idea man. I've long passed that NVH threshold ages ago.

[GreekboyD]

Here is a list of the various SF bushing upgrades over our stock 335d ones:



Stock M3 Rubber:

https://www.turnermotorsport.com/p-1...ubber-e82-e9x/




Powerflex Race Polyurethane:


https://www.ecstuning.com/BMW-E90-33....0L/ES2650550/

https://www.ecstuning.com/BMW-E90-33....0L/ES2650204/




Turner Solid Delrin/Aluminum:

https://www.turnermotorsport.com/p-1...minum-e82-e9x/




Turner Solid Aluminum:

https://www.turnermotorsport.com/p-1...minum-e82-e9x/




Group N Race Rubber:

https://www.turnermotorsport.com/p-1...ubber-e82-e9x/

[shnaggs]

Originally Posted by GreekboyD

No idea man. I've long passed that NVH threshold ages ago.

Fair enough

[TDIwyse]

Originally Posted by GreekboyD

...Can't believe how flimsy the stock tranny mounts looked when I replaced them today with upgraded Rogue Engineering ones....

Thanks for the thread. Any comments/tips/lessons learned on the replacement you could share?

[GreekboyD]

Originally Posted by TDIwyse

Thanks for the thread. Any comments/tips/lessons learned on the replacement you could share?

Pretty straight forward install. Great thread here:

Link

Car definitely feels more planted (when hammering the skinny pedal) after install as I also I installed the differential lockdown kit as well. I believe Yozh has also installed the latter as well.


Had the tranny mounts and diff lockdown kit sitting there for over a year.

[Fundguy1]

You guys gotta get out and explore the rest of the board. I can count on my fingers and toes the number of threads on this stuff.
The tranny oem mounts are very loose. Using the Rogue engineering ones it tightened up the stick but adds no NVH. It's a DIY 30 minute job with a jack, 2 wrenches, and an 8mm nut driver.

Subframe bushings are much more involved. They tighten up the rear and lessen squirming and side to side in the corners if the rear end.

Weakest to strongest in order
Oem
Inserts
M3
Yellow
Purple
Black
Derlin
Solid aluminum

I got black from AKG. Powerflex has the colors too but we're more expensive and my shop has had good results with AKG so I didn't argue. LIL firmer ride but no noticeable NVH. Some guys with Derlin or solid report slightly more NVH, some none.

Inserts are relatively easy. Full replacement is typically a remove the subframe and need a press bigger deal but worth it in my book. Hope this helps.

[Fundguy1]

Oh and skip the rear diff and engine mounts. Stick with oem. Refresh as needed. The stiffer aftermarket stuff does add NVH and they aren't necessary.

[Thecastle]

I'd add one more thing to this,list. You can significantly tighten up the rear end subframe by installing a trailer hitch. The u-haul trailer hitch is a solid 2 piece setup that directly connects the rear subframe to the rear bumper. I found it made a significant difference in reducing rear end squirm and the side to side (rear end wiggle) a lot of us experience in e90s.

[GreekboyD]

Originally Posted by Fundguy1

You guys gotta get out and explore the rest of the board. I can count on my fingers and toes the number of threads on this stuff.
The tranny oem mounts are very loose. Using the Rogue engineering ones it tightened up the stick but adds no NVH. It's a DIY 30 minute job with a jack, 2 wrenches, and an 8mm nut driver.

Subframe bushings are much more involved. They tighten up the rear and lessen squirming and side to side in the corners if the rear end.

Weakest to strongest in order
Oem
Inserts
M3
Yellow
Purple
Black
Derlin
Solid aluminum

I got black from AKG. Powerflex has the colors too but we're more expensive and my shop has had good results with AKG so I didn't argue. LIL firmer ride but no noticeable NVH. Some guys with Derlin or solid report slightly more NVH, some none.

Inserts are relatively easy. Full replacement is typically a remove the subframe and need a press bigger deal but worth it in my book. Hope this helps.

Appreciate the input man. A few of us have already ventured into this territory. We know the pain money wise.

I created this topic mainly because a lot of the 335d cars post tune are putting down crazy torque figures with many of them on stock suspension parts.

[Fundguy1]

What you should do if you're making crazy torque, which I am too, 600+ rwtq, is LSD, LSD lockdown kit, subframe bushings,(m3 minimum but stiffer recommended) Rouge engineering trans mounts if manual, check and replace differential and engine mounts as needed, and enjoy. This will stop you from getting wheel hop and allow you to put the power down in a controlled and NVH free way.

[GreekboyD]

Originally Posted by Fundguy1

What you should do if you're making crazy torque, which I am too, 600+ rwtq, is LSD, LSD lockdown kit, subframe bushings,(m3 minimum but stiffer recommended) Rouge engineering trans mounts if manual, check and replace differential and engine mounts as needed, and enjoy. This will stop you from getting wheel hop and allow you to put the power down in a controlled and NVH free way.

I'm running pretty much all that. If anything my thinking was to upgrade the M3 SF bushings at some point.

[335dFan]

I did the M3 SF bushings when I did the Quaife LSD 47k miles ago.

[Fundguy1]

M3 is good but really not much stiffer. I'd go black minimum. Quaife is a bit over priced. MFactory and Wavetrac are similar quality and thousands less. I have a Wavetrac. Lil more street oriented. MFactory is a little more track oriented.

[Yozh]

Originally Posted by Fundguy1

Inserts are relatively easy. Full replacement is typically a remove the subframe and need a press bigger deal but worth it in my book. Hope this helps.

After doing my solid aluminum I'm convinced that removing the subframe route has been perpetuated by either mechanics that wanted to make the money or folks that read forums and take the consensus as the truth.

We just used proper bushing press without removing the subframe. The whole affair was literally 5 min per bushing. Bushings were treated in dry ice before the procedure. The difference is amazing.

The background thought from my end was, if I'm gonna go through the process, I just want to do it once and never again.

[GreekboyD]

Just got my hands on a set of unused Turner Solid Delrin/Aluminum SF bushings for a price that I just couldn't pass up.

Already running the M3 ones so not sure when these will go on.

[Yozh]

put them in, you will not regret it.

[TDIwyse]

Originally Posted by GreekboyD

...
How many of you have upgraded your tranny mounts or subframe bushings?

Hey, while having the vehicle on the lift this weekend for some experimenting with the downpipe/turbo transition, I put in the trans mounts you mentioned.

It was a wonderfully straight forward modification that went smoothly. I love those :-)

Just wanted to add that I did notice a slight reduction in road surface isolation. There's more energy being transferred to the chassis/seat/backside... Nothing "harsh" or annoying, but was able to notice the increase.

Thanks for the suggestion on this modification.

[supermann125]

I also put those in. Good time to hit up the Guibo as well