Lightweight Single mass trans rattle

krzychumz · 06-26-2021, 02:03 PM

Hey guys!
I went with solid rubber engine mounts and ECS poly trans mounts to give it a bit more stiffness. I was expecting the rattle so I've raised the idle to 850rpm
I've put redline ATF D4 since it was recommended by many. Now I'm thinking of going with thicker 75w90 to quiet it down a bit.
The rattle on idle is fine, but its super loud on gears 1 through 4.
I don't mind it on 1st and 2nd but cruising on 3rd and 4th is like I've had a straight cut sequential gearbox 🤣 definitely louder than vrsf's street exhaust in this car... Which makes it hard to talk. I know it's something I have to deal with from now on but I just wondered if putting thicker oil would "camouflage" that noise a little? 🤔

Aceway · 06-26-2021, 04:02 PM

This combo helps. You'll have to learn to live with a little rattle or maybe softer trans mounts will help. E46 M3 mounts come to mind.

http://store.uucmotorwerks.com/artic...uce_rattle.htm

haaken675 · 06-26-2021, 08:18 PM

Quote:

Originally Posted by Aceway

This combo helps. You'll have to learn to live with a little rattle or maybe softer trans mounts will help. E46 M3 mounts come to mind.

http://store.uucmotorwerks.com/artic...uce_rattle.htm

Thanks for sharing that! Will be trying that soon i think.

ErvGotti · 06-27-2021, 09:54 AM

The ECS poly's are brutal, I ran them for a bit but found them too loud for a DD for the performance they bring. I tried the thicker formula linked by UUC and if it did anything I didn't notice. I literally had friends ask if something was wrong with my car as it sounded like a bunch of rocks in the transmission.

I switched to solid rubber tranny mounts and found that to be a happy medium. For reference I have the tuner motorsports SMFW so it's a bit noisy to begin with.

krzychumz · 06-27-2021, 06:24 PM

Thank you! I'll try following that link, I already have the tranny filled fresh with D4, so all I need is to buy a quart of the thick one 😅
If that won't help I'll just turn up the music volume 😂
I really like how solid the mounts are, and won't go back 😅

neilvan · 06-30-2021, 03:20 PM

I have a 50/50 mix of D4 and MTL. That's the mix id do before going to MT90 (75w90).

My 50/50 mix works great in the summer but in the fall when its getting closer to freezing cold starts can be notchy; I cant imagine doing that with full MTL or heavier.

Also you can try loosening the mounts, running it and tightening it once turning it off(if you havent already) as it puts the mounts in their neutral state

06-26-2021, 02:03 PM	#1
krzychumz Registered 0 Rep 4 Posts Drives: 07' 335i e92 Join Date: May 2019 Location: Aurora, IL iTrader: (0)	Lightweight Single mass trans rattle - will thicker oil help? Hey guys! I went with solid rubber engine mounts and ECS poly trans mounts to give it a bit more stiffness. I was expecting the rattle so I've raised the idle to 850rpm I've put redline ATF D4 since it was recommended by many. Now I'm thinking of going with thicker 75w90 to quiet it down a bit. The rattle on idle is fine, but its super loud on gears 1 through 4. I don't mind it on 1st and 2nd but cruising on 3rd and 4th is like I've had a straight cut sequential gearbox 🤣 definitely louder than vrsf's street exhaust in this car... Which makes it hard to talk. I know it's something I have to deal with from now on but I just wondered if putting thicker oil would "camouflage" that noise a little? 🤔
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06-26-2021, 04:02 PM	#2
Aceway Captain 460 Rep 875 Posts Drives: E82 135i / F25 28i Join Date: Feb 2018 Location: SoCal iTrader: (2)	This combo helps. You'll have to learn to live with a little rattle or maybe softer trans mounts will help. E46 M3 mounts come to mind. http://store.uucmotorwerks.com/artic...uce_rattle.htm
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06-27-2021, 09:54 AM	#4
ErvGotti Major 122 Rep 1,360 Posts Drives: 2008 135i 6MT Join Date: Jul 2010 Location: Aviano iTrader: (5) Garage List 2008 135i [6.00]	The ECS poly's are brutal, I ran them for a bit but found them too loud for a DD for the performance they bring. I tried the thicker formula linked by UUC and if it did anything I didn't notice. I literally had friends ask if something was wrong with my car as it sounded like a bunch of rocks in the transmission. I switched to solid rubber tranny mounts and found that to be a happy medium. For reference I have the tuner motorsports SMFW so it's a bit noisy to begin with.
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06-27-2021, 06:24 PM	#5
krzychumz Registered 0 Rep 4 Posts Drives: 07' 335i e92 Join Date: May 2019 Location: Aurora, IL iTrader: (0)	Thank you! I'll try following that link, I already have the tranny filled fresh with D4, so all I need is to buy a quart of the thick one 😅 If that won't help I'll just turn up the music volume 😂 I really like how solid the mounts are, and won't go back 😅
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06-30-2021, 03:20 PM	#6
neilvan Major 861 Rep 1,373 Posts Drives: 09 E90 335i M-Sport 6MT RWD Join Date: Nov 2017 Location: Ontario, Canada iTrader: (0) Garage List 2007 BMW E61 530xi [0.00] 1993 Mazda Miata [0.00] 2009 BMW E90 335i [0.00]	I have a 50/50 mix of D4 and MTL. That's the mix id do before going to MT90 (75w90). My 50/50 mix works great in the summer but in the fall when its getting closer to freezing cold starts can be notchy; I cant imagine doing that with full MTL or heavier. Also you can try loosening the mounts, running it and tightening it once turning it off(if you havent already) as it puts the mounts in their neutral state
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