Diff and Trans Inserts

[s42014DSG]

Hi All,

I'm considering trans and diff inserts for my 2015. I was wondering whether there may be a corresponding increase in wear resulting from the elimination of play around these parts. Is there any cause for concern here?

And finally: as a bare minimum: which inserts should go with? Just trans? Or lower/upper diff as well? Do the B8.5s take both diff inserts?

Thanks,
A.

[14S4GWM]

You shouldn't worry about any increase in wear. It's taking slop out not adding to it. You have DSG so I would recommend getting all 3 of them.

034 makes a complete set and it's nice.
https://store.034motorsport.com/034m...-aluminum.html

Eurocode makes the same set but cheaper than 034. Both aluminum.
http://www.ecodetuning.com/store/aud...rivetrain.html

ECS only has the front and rear diff mounts and they are made of polyurethane
https://www.ecstuning.com/Audi-B8_S4..._Differential/

EDIT
Heres a nice vid of the slop
http://www.audizine.com/forum/showth...udi-B8-B8-5-A4

[s42014DSG]

Super helpful. Thanks!

I guess I thought the "slop", as it is so affectionately called, might have somehow made life easier on the mechanicals inside the box itself. I can see an argument both ways and wanted to check: helpful insights!

Thanks again,
A.

[Rocket Tech]

Super helpful. Thanks!

I guess I thought the "slop", as it is so affectionately called, might have somehow made life easier on the mechanicals inside the box itself. I can see an argument both ways and wanted to check: helpful insights!

Thanks again,
A.

It does - it absorbes energy and converts it into deforming the bushing. Whether or not going to a solid bushing hurts mechanical life of components isn't very clear. The bushings are most likely hollow from the factory for NVH and comfort reasons and not due to excessive vibration of components. Without knowing the full load path of the power train system I'm hard pressed to figure out what it does to driveline stress. I do feel the occasional hard shudder during a fast acceleration which annoys me but I'm also very sensitive to NVH so not sure I'm willing to sacrifice comfort for a crisper shift. I spent some time working BSR/NVH on cars and I'm an outlier for these things, feedback from most people has been positive as far as noise and comfort go. The ECS ones may be the ticket for me, waiting for more reviews and possibly a ride in an upgraded car to assess before I make up my mind.

[s42014DSG]

Interesting to see others asking similar questions. Let me know what you find out!

[agorich]

It does - it absorbes energy and converts it into deforming the bushing. Whether or not going to a solid bushing hurts mechanical life of components isn't very clear. The bushings are most likely hollow from the factory for NVH and comfort reasons and not due to excessive vibration of components. Without knowing the full load path of the power train system I'm hard pressed to figure out what it does to driveline stress. I do feel the occasional hard shudder during a fast acceleration which annoys me but I'm also very sensitive to NVH so not sure I'm willing to sacrifice comfort for a crisper shift. I spent some time working BSR/NVH on cars and I'm an outlier for these things, feedback from most people has been positive as far as noise and comfort go. The ECS ones may be the ticket for me, waiting for more reviews and possibly a ride in an upgraded car to assess before I make up my mind.

i'm with you on that rocketTech. I was thinking, yes-the shifts would be smoother but where does the feel of all of the vibration that it mitigates go? I am unfamiliar with this all together but was curious of it. Then with the vibration going away, what parts are being stressed due to this?

Maybe I just need to do more searches to find out but that was my initial thought when watching the video.

[jrivera]

I have all 3 on my '14. I have 26k miles on my car. I have no additional noise than before the install. Hard braking and accelerating feel great. Everything just feels solid but no NVH

[HeymyAudi]

I have all 3 on my '14. I have 26k miles on my car. I have no additional noise than before the install. Hard braking and accelerating feel great. Everything just feels solid but no NVH

Reading this just made me more eager to get mine installed this week..

[Dakkath]

I have two friends who have the 034 package of mounts. One is a 2013 S4 DSG, the other is a 2016 S4 Manual; both say they have no noticeable NVH; because I had the same worries.

[BlownOne]

I just installed the 034 drivetrain mount kit...parts are nice, fit well, and made a noticeable difference. I lubed all the billet pieces sufficiently with grease before installing and there doesn't seem to be any extra noise.

Will

[torinalth]

on the other side there was a post a while ago that talked about the various driveline whine and vibration that people were seeing with both the 034 and eurocode. I have read that partly it is due to install, but there seems to be no definitive reason for who gets it vs who doesn't. ECS made the poly inserts to combat this, but they are very new so there is only a handful of reports from them as of yet. i'm thinking of doing the rear diff bushings only from ECS and seeing if that does anything either pro or con to the car.

[ATX_S4]

I am very interested in these mount inserts as well - especially the transmission insert. I have some clunking noises in my DSG when slowing down gradually to a stop after spirited driving (mostly in manual mode allowing the transmission to downshift itself).

Here's a video of the noise: https://www.youtube.com/watch?v=56TS...ature=youtu.be

Does anyone think these would drastically improve my situation?? Would one show a bigger improvement over the other?

Also is there any difference in the quality of the 034 and Eurocode products or should they both perform the same function?

[kcobourn]

My 034 rear diff mounts whine. Will take out the top mount to see if that fixes it. To date my shop tried adjusting to no avail.


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[jrivera]

Obviously I have the 034 so I can only speak for that. The quality was excellent. All parts were anodized. I only wish they had it in black. I also did the X brace and would do it all over again.

Side note. I took it to an anodizing shop to have it done in black. The shop said the machining and quality of the parts were excellent. They really didn't want to anodize it either because of how well it was done. I opted not in the end.

[SpltsecondS4]

anyone have any feedback on the Eurocode inserts vs the 034 inserts? they are made of the same material...but quality wise.

thanks

[BlownOne]

on the other side there was a post a while ago that talked about the various driveline whine and vibration that people were seeing with both the 034 and eurocode. I have read that partly it is due to install, but there seems to be no definitive reason for who gets it vs who doesn't. ECS made the poly inserts to combat this, but they are very new so there is only a handful of reports from them as of yet. i'm thinking of doing the rear diff bushings only from ECS and seeing if that does anything either pro or con to the car.

I think the install method is key...I greased the shit out of the inside of the inserts when I installed them and I have zero noise/vibrations.

My 034 rear diff mounts whine. Will take out the top mount to see if that fixes it. To date my shop tried adjusting to no avail.


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Have them use grease instead of silicone spray and apply it liberally.

[rulaxin12]

It seems that in reviews the transmission mount for manual cars makes the biggest noticeable difference, but the top and bottom diff mounts less noticeable. Sounds like the top and bottom mounts also cause some drivetrain whine...

Anyone do these mods in stages and can comment on if the diff mounts didn't cause any noticeable difference?

[creativecody]

I have the Eurocode Transmission and Diff mounts. I've had them for quite awhile now. I underestimated the difference they made. I wasn't expecting much but it is a very noticeable difference (reduction in movement) and what feels to be more snappy, instantaneous gear changes with the DSG. I do get a little whine when off throttle at 40mph. I don't have any additional vibrations but there is a slight audible whine when I'm slowing down and I get near 40mph and my foot is off the gas. As soon as I touch the gas it goes away. Will that bother some people? Probably. But I'm ok with it. I highly recommend the Eurocode set. My AWE exhaust probably masks the whine anyway. haha....

[14S4GWM]

I have all of the 034 pieces and did not notice any NVH. I also have an AWE exhaust so if there is any whine which I don't think there is I probably wouldn't hear it either. The trans mount definitely made a difference with the shifting being smoother.

[SportVier]

Any guesses on the probability of Audi denying warranty coverage for a DSG or Sport diff failure if they find you are "running" these mount inserts?

High enough that you should remove them before taking the car in to have a potential transmission or diff issue checked out?

[kcobourn]

The rear diff mounts make a HUGE difference on my 6MT. The trans mount is solid but without the rear mounts you're really missing out on a significant opportunity to tighten up your shifting. The shifts are so solid now and smoother.


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[4wheelpilot]

I am very interested in these mount inserts as well - especially the transmission insert. I have some clunking noises in my DSG when slowing down gradually to a stop after spirited driving (mostly in manual mode allowing the transmission to downshift itself).

Here's a video of the noise: https://www.youtube.com/watch?v=56TS...ature=youtu.be

Does anyone think these would drastically improve my situation?? Would one show a bigger improvement over the other?

Also is there any difference in the quality of the 034 and Eurocode products or should they both perform the same function?

Had the Eurocode trans insert installed (less expensive than 034). It made a noticeable, and I would say significant improvement.
It virtually eliminated the clunk ("driveline lash") that I always heard and felt when downshifting and a similar clunk that I would feel occasionally with aggressive accelerating.
And it eliminated the drone of the DSG when in "D" mode (rpms around 1200).
I have not heard or felt anything negative from these.

Also had the ECS rear diff inserts installed, because of their PU interface. I haven't heard any noises or felt any vibrations.

I recommend both highly.

The way the S4 feels now is, imho, the way Audi should have designed it from the start.

[justr0]

I have the Eurocode Transmission and differential mounts in anodized red. Nothing but good things to say about them. Cheaper than 034 and available in 2 colors (black, red). I wanted them in red since the color matches my red Eurocode sway bars (yes i know you can't see them anyways, but my OCD kicked in)