Motor, Transmission, and Differential Mounts

///Mobbin · 04-30-2016, 07:18 AM

I installed transmission and differential mounts in my last car and it made a world of difference at the track. I'm curious what all you've done to your cars and whether or not you're happy with it?

Shopping motor mounts at the moment, a few options I'm considering here:
Vibra Technics
Bimmerworld Performance-Track
Blackforest Industries Stage II

Thoughts appreciated.

Kong Sheng Han · 04-30-2016, 08:07 AM

I have the BW GroupN mounts, and I like them. Not sure how to compare performance vs OE as my OE ones were at the end of their life, but the vibration these produce isn't bad.

bigjae1976 · 05-02-2016, 10:15 PM

I did poly engine mounts in my E46 330Ci and it made a world of difference shifting.

I just put solid engine and trans mounts in my E46 M3. No track time yet but it quite loud. Again, the shifting is much improved.

I'm sure throttle response is improved but I can't perceive any difference.

roastbeef · 05-02-2016, 10:29 PM

i already decided i'm going to do solid frame/diff mounts, but i'm not ready to part with the cash yet. i may also do slightly firmer motor and dct mounts, but i need to do more research. i remember reading a post about mounts that were slightly firmer than oem, but didn't really add any harshness.

RickyBobby · 05-03-2016, 12:22 PM

I've got the bimmerworld performance motor mounts and love them. They add a bit of engine vibration that I think actually improves the driving experience (and I normally don't like a lot of nvh).

I'm curious if the solid tranny mounts you added have introduced a lot of vibration and noise. I don't known of any middle of the road options for transmission mounts at this time.

RickyBobby · 05-03-2016, 12:25 PM

I also have solid differential mounts and they add a lot of gear whine. While I like the snappiness in the driveline, the noise is a bit much for a street car.

dparm · 05-03-2016, 01:33 PM

I've debated stiffer rear diff mounts (poly, not solid) to help put the power down better, but it's awfully expensive to get them installed. I suppose if mine were on their way out I'd go stiffer, but for now I'll make do with the stock ones.

redpriest · 05-03-2016, 01:37 PM

Quote:

Originally Posted by dparm

I've debated stiffer rear diff mounts (poly, not solid) to help put the power down better, but it's awfully expensive to get them installed. I suppose if mine were on their way out I'd go stiffer, but for now I'll make do with the stock ones.

dparm How are you liking the Motul DCT fluid? Any issues? I'm thinking of going this route when I get the DCT cooler swapped out in a couple weeks.

dparm · 05-03-2016, 02:36 PM

Quote:

Originally Posted by redpriest

dparm How are you liking the Motul DCT fluid? Any issues? I'm thinking of going this route when I get the DCT cooler swapped out in a couple weeks.

Works fine. I wasn't really expecting any significant differences over the OEM Pentosin stuff, other than the fatter wallet.

nholmes · 05-03-2016, 02:41 PM

I have these:

http://www.bimmerworld.com/Engine/En...Mount-Set.html

They're pretty tame, but there is slightly more NVH at idle. My exhaust "buzzes" now, but it's not OEM to begin with.

YMMV.

EDIT: Also, while you're in there you might want to slap an E36M heat shield on them or just fab up some. That's what I did.

Here's the part for the E36M:

///Mobbin · 05-03-2016, 02:47 PM

Quote:

Originally Posted by Kong Sheng Han

I have the BW GroupN mounts, and I like them. Not sure how to compare performance vs OE as my OE ones were at the end of their life, but the vibration these produce isn't bad.

Quote:

Originally Posted by RickyBobby

I've got the bimmerworld performance motor mounts and love them. They add a bit of engine vibration that I think actually improves their driving experience (and I normally don't like a lot of nvh).

Ya'll have me leaning towards the Bimmerworld performance/track motor mounts: noticeable rigidity increase but not overly harsh, cost effective, and oem look.

On the transmission/diff mounts I think I may hold off until I have a second car. Both for NVH reasons as well as cost/effort to install.

Kong Sheng Han · 05-03-2016, 03:49 PM

Quote:

Originally Posted by ///Mobbin

Ya'll have me leaning towards the Bimmerworld performance/track motor mounts: noticeable rigidity increase but not overly harsh, cost effective, and oem look.

On the transmission/diff mounts I think I may hold off until I have a second car. Both for NVH reasons as well as cost/effort to install.

You and I are both in Houston. If you want to come to Katy between May 16 and May 30, I can let you get a feel for what they are like on E46 with Rogue Engineering poly trans mounts. I'll also be at TWS May 21-22.

Regarding trans mounts, shift feel was improved, and NVH isn't bad IMO. The wording of your post suggests that you don't DIY? If so, I could possibly install your motor/trans mounts for less than what a shop would charge.

///Mobbin · 05-03-2016, 04:34 PM

nholmes Good tip on the heat shields, thanks!

Quote:

Originally Posted by Kong Sheng Han

You and I are both in Houston. If you want to come to Katy between May 16 and May 30, I can let you get a feel for what they are like on E46 with Rogue Engineering poly trans mounts. I'll also be at TWS May 21-22.

Regarding trans mounts, shift feel was improved, and NVH isn't bad IMO. The wording of your post suggests that you don't DIY? If so, I could possibly install your motor/trans mounts for less than what a shop would charge.

I appreciate the offer, thanks. I do the work myself actually, just not thrilled about dropping the sub-frame for the rear mounts.

dj_dub · 05-03-2016, 04:35 PM

I puchased the Vibra Technics engine mounts...they look great! Going to install them next weekend and track on them soon. I'll let you know my initial impressions.

///Mobbin · 05-03-2016, 04:38 PM

Quote:

Originally Posted by dj_dub

I puchased the Vibra Technics engine mounts...they look great! Going to install them next weekend and track on them soon. I'll let you know my initial impressions.

Nice, looking forward to the review!

nholmes · 05-03-2016, 05:01 PM

Quote:

Originally Posted by ///Mobbin

nholmes Good tip on the heat shields, thanks!

I was baffled that they were not included. If you look, you'll see that the exhaust headers sit mere inches from the rubber motor mounts.

What the hell?

bigjae1976 · 05-03-2016, 09:01 PM

If anything, I'd do solid engine mounts and leave the rest OEM if it were a street car.

Poly mounts are a PIA since they are sensitive to torque. Too much and you'll get lots of buzzing and then they'll snap off.

Say what you want...I call bullsh1t when people say they torqued them down. Ain't to way to get an smooth and accurate pull on a torque wrench connected to extensions and flex joints. Who has the proper crows foot to torque the top nut on the trans? No one.

///Mobbin · 05-04-2016, 08:15 AM

Vorshlag Polyurethane Competition Motor Mounts

I take it you don't recommend these then? Curious if anyone's running them on an e9x.

pbonsalb · 05-04-2016, 08:55 AM

I have run them on my E36M3, which uses the same mounts as an E9xM3, for about 5 years. They add some NVH noticeable at low rpm. More than Bimmerworld Group N replicas, which I have also run.

Poly motor mounts, even the AKG 75D, are not offensive to me on a daily driver. Bolt through or solid mounts are.

On the E36M3, I tried red poly bolt through trans mounts, and could not get them out of the car fast enough. I would go softer on the trans mounts, which are essentially rear engine mounts, than on the engine mounts, for a street driven car.

Same goes for subframe and diff mounts. Go hard on the subframe mounts and softer on the diff mounts or you will get whine you may not like. Probably more whine than vibration.

If it is a race car, solid mount everything and buzz away.

italyix · 05-04-2016, 09:24 AM

Quote:

Originally Posted by ///Mobbin

Vorshlag Polyurethane Competition Motor Mounts

I take it you don't recommend these then? Curious if anyone's running them on an e9x.

I run them and have zero issues. Engine feels tight but does vibrate. Honestly who cares, the whole car basically has been converted to either solid mounts or poly and I still enjoy daily driving it

Kong Sheng Han · 05-04-2016, 09:39 AM

Bigjae recommends staying away from them. He's seen some top nut/bolt failures.

Bx Tpr · 05-04-2016, 10:00 AM

I've had the AKG's in for over 10,000 miles and they're great.

http://www.akgmotorsport.com/product...yurethane-75d/

The only drivetrain mount I didn't change was the tranny mount. I tried it and the noise inside the cabin was too much.

04-30-2016, 07:18 AM	#1
///Mobbin Colonel 1551 Rep 2,772 Posts Drives: m3 Join Date: Jul 2011 Location: Houston iTrader: (3)	Motor, Transmission, and Differential Mounts I installed transmission and differential mounts in my last car and it made a world of difference at the track. I'm curious what all you've done to your cars and whether or not you're happy with it? Shopping motor mounts at the moment, a few options I'm considering here: Vibra Technics Bimmerworld Performance-Track Blackforest Industries Stage II Thoughts appreciated. __________________ 2020 M2 Competition \| 3.0L \| DCT
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04-30-2016, 08:07 AM	#2
Kong Sheng Han Banned 329 Rep 1,140 Posts Drives: Something something racecar Join Date: Feb 2013 Location: Austin, Texas iTrader: (2) Garage List 2011 BMW 328i [0.00] 2001 BMW M3 [0.00]	I have the BW GroupN mounts, and I like them. Not sure how to compare performance vs OE as my OE ones were at the end of their life, but the vibration these produce isn't bad.
	Appreciate 1 Quote

05-02-2016, 10:15 PM	#3
bigjae1976 Major General 2013 Rep 8,248 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [6.33] 2011 BMW E90 M3 [6.83] 2013 BMW 328i [6.67]	I did poly engine mounts in my E46 330Ci and it made a world of difference shifting. I just put solid engine and trans mounts in my E46 M3. No track time yet but it quite loud. Again, the shifting is much improved. I'm sure throttle response is improved but I can't perceive any difference. __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
	Appreciate 1 ///Mobbin1550.50 Quote

05-02-2016, 10:29 PM	#4
roastbeef Lieutenant General 11865 Rep 12,880 Posts Drives: E92 M3 Join Date: Nov 2010 Location: Orange County, CA iTrader: (4)	i already decided i'm going to do solid frame/diff mounts, but i'm not ready to part with the cash yet. i may also do slightly firmer motor and dct mounts, but i need to do more research. i remember reading a post about mounts that were slightly firmer than oem, but didn't really add any harshness. __________________ Instagram; @roastbeefmike
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05-03-2016, 12:22 PM	#5
RickyBobby Captain 113 Rep 697 Posts Drives: M3 Join Date: Mar 2008 Location: NorCal iTrader: (3)	I've got the bimmerworld performance motor mounts and love them. They add a bit of engine vibration that I think actually improves the driving experience (and I normally don't like a lot of nvh). I'm curious if the solid tranny mounts you added have introduced a lot of vibration and noise. I don't known of any middle of the road options for transmission mounts at this time.
	Appreciate 3 ebisueight1103.00 Jimzym3117.00 Quote

05-03-2016, 12:25 PM	#6
RickyBobby Captain 113 Rep 697 Posts Drives: M3 Join Date: Mar 2008 Location: NorCal iTrader: (3)	I also have solid differential mounts and they add a lot of gear whine. While I like the snappiness in the driveline, the noise is a bit much for a street car.
	Appreciate 1 Quote

05-03-2016, 01:33 PM	#7
dparm Stop the hate, get a V8 3928 Rep 8,631 Posts Drives: C7 Corvette, Spec E46, G87 M2 Join Date: Jun 2013 Location: Frisco, TX iTrader: (1)	I've debated stiffer rear diff mounts (poly, not solid) to help put the power down better, but it's awfully expensive to get them installed. I suppose if mine were on their way out I'd go stiffer, but for now I'll make do with the stock ones. __________________ Now: 2017 Corvette Grand Sport, 2001 BMW Spec E46 race car, 2025 BMW M2 Past: 2011.5 M3 sedan ZCP
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05-03-2016, 02:41 PM	#10
nholmes Track Whore 555 Rep 1,657 Posts Drives: women wild Join Date: Oct 2015 Location: NorCal iTrader: (15)	I have these: http://www.bimmerworld.com/Engine/En...Mount-Set.html They're pretty tame, but there is slightly more NVH at idle. My exhaust "buzzes" now, but it's not OEM to begin with. YMMV. EDIT: Also, while you're in there you might want to slap an E36M heat shield on them or just fab up some. That's what I did. Here's the part for the E36M: __________________ 1998 E36 M3 2018 X5 35dX Last edited by nholmes; 05-03-2016 at 02:48 PM..
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05-03-2016, 04:35 PM	#14
dj_dub IG: @dj_dub 1870 Rep 1,454 Posts Drives: 2010 BMW E90 M3 - SG/FR 6MT Join Date: Jan 2013 Location: SF Bay Area to Las Vegas iTrader: (4) Garage List 2023 Sequoia TRD Pro [0.00] 2017 Porsche 991.2 C2S [0.00] 2006 BMW E46 M3 Vert [0.00] 2010 BMW E90 M3 [6.00]	I puchased the Vibra Technics engine mounts...they look great! Going to install them next weekend and track on them soon. I'll let you know my initial impressions. __________________ CarboProject CF Plenum \| Dinan CF Intake \| ESS Tune \| RKP X-Pipe \| Akra w/CF Tips \| MFactory CF DS \| CSF Cooling \| AST 5200 \| Hotchkis F/R Sways \| SPL/Ground Control/Fall-Line Arms \| DEFIV Diff Brace \| StudioRSR Rollcage \| 3-piece BBS RT88 \| Michelin PS4S \| Brembos F/R \| Recaro Profi SPG XL \| CAE Ultra Shifter \| OMP/Ridgeline Wheel \| BAVSOUND \| GT4 CF Front Lip/Canards/Rear Wing \| Arkym CF Rear Diffuser \| Forcewerkz CF SS \| Varis CF Lower Tray \| Turner Skidplate \| BayOptiks Headlights
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05-03-2016, 09:01 PM	#17
bigjae1976 Major General 2013 Rep 8,248 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [6.33] 2011 BMW E90 M3 [6.83] 2013 BMW 328i [6.67]	If anything, I'd do solid engine mounts and leave the rest OEM if it were a street car. Poly mounts are a PIA since they are sensitive to torque. Too much and you'll get lots of buzzing and then they'll snap off. Say what you want...I call bullsh1t when people say they torqued them down. Ain't to way to get an smooth and accurate pull on a torque wrench connected to extensions and flex joints. Who has the proper crows foot to torque the top nut on the trans? No one. __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
	Appreciate 1 Quote

05-04-2016, 08:15 AM	#18
///Mobbin Colonel 1551 Rep 2,772 Posts Drives: m3 Join Date: Jul 2011 Location: Houston iTrader: (3)	Vorshlag Polyurethane Competition Motor Mounts I take it you don't recommend these then? Curious if anyone's running them on an e9x. __________________ 2020 M2 Competition \| 3.0L \| DCT
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05-04-2016, 08:55 AM	#19
pbonsalb Lieutenant General 7679 Rep 13,759 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	I have run them on my E36M3, which uses the same mounts as an E9xM3, for about 5 years. They add some NVH noticeable at low rpm. More than Bimmerworld Group N replicas, which I have also run. Poly motor mounts, even the AKG 75D, are not offensive to me on a daily driver. Bolt through or solid mounts are. On the E36M3, I tried red poly bolt through trans mounts, and could not get them out of the car fast enough. I would go softer on the trans mounts, which are essentially rear engine mounts, than on the engine mounts, for a street driven car. Same goes for subframe and diff mounts. Go hard on the subframe mounts and softer on the diff mounts or you will get whine you may not like. Probably more whine than vibration. If it is a race car, solid mount everything and buzz away.
	Appreciate 2 slowdown_dan284.00 Quote

05-04-2016, 09:39 AM	#21
Kong Sheng Han Banned 329 Rep 1,140 Posts Drives: Something something racecar Join Date: Feb 2013 Location: Austin, Texas iTrader: (2) Garage List 2011 BMW 328i [0.00] 2001 BMW M3 [0.00]	Bigjae recommends staying away from them. He's seen some top nut/bolt failures.
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05-04-2016, 10:00 AM	#22
Bx Tpr Captain 136 Rep 891 Posts Drives: 23 CSL Join Date: Feb 2009 Location: NY iTrader: (8)	I've had the AKG's in for over 10,000 miles and they're great. http://www.akgmotorsport.com/product...yurethane-75d/ The only drivetrain mount I didn't change was the tranny mount. I tried it and the noise inside the cabin was too much.
	Appreciate 1 Quote