Gauging Interest in OEM style BEEFY differential mounts

[lumberjackj]

After reading almost every thread on the dreaded diff clunk, solid diff mount issues, and ripping of stock lower diff mounts, I have decided to take action!!!!

A little background....

 

I have been employed at this shop, 034motorsport, for a few years and we offer a whole "Density Line" of OEM mounts for Audis and VWs in a few different durometers. NOW, the difference between our mounts and stock mounts are the fact that they are filled to limit the movement of the drive train and they also have a slightly stiffer durometer material.

 

Now with that being said, I have been thinking about all the issues with the stock mount, and decided that having a completely filled mount would eliminate MOST of those issues (besides lowering the nose for certian swaps).

 

Heres the info from our webpage,

 

"STREETDENSITY Mounts are solid rubber mounts with a 50 durometer about 10% stiffer than stock, this means they still ride smooth and quiet but provide a marked improvement in drivetrain dampening over stock mounts. Livable street performance with serious sport intentions. Note, since there are no voids or air pockets in these mounts, even though the rubber is only 10% stiffer, the resulting reduction in drivetrain movement is actually 25% stiffer.

 

TRACKDENSITY Mounts are also solid rubber mounts, but with an 80 durometer approx 90% stiffer than stock, these are solid for all practical purposes and result in ZERO drivetrain movement. Vibrations from the engine are noticeably increased but not horrible. Definitely not smooth and quiet like stock mounts, but in return you get a completely locked down drivetrain with NO slop or deflection. These are perfect for the street/track enthusiast who doesn't mind a marked increase in vibration from the drivetrain. NOTE, THIS IS NOT AN OE MOUNT, AND ARE NOT AVAILABLE FROM ANY OTHER SOURCE - These are built by an OE supplier to 034Motorsport specifications."

 

 

Im hoping to get a large amount of interest in these things. So if you have ANY questions, concerns or comments, feel free to post up!

 

 

LOCK THAT DIFF DOWN!

 

 

I will be uploading photos later on tonight of an OEM Audi mount and a Density Line mount so you guys can get an idea of what im trying to accomplish.

[Drax240z]

I think if you build it, build it well, and offer it at a fair price you'll do well with it. I would tend towards a mount style where even if the bushing were to fail, there is still a mechanical lock that prevents the diff nose from slapping around too much.

[lumberjackj]

I think if you build it, build it well, and offer it at a fair price you'll do well with it. I would tend towards a mount style where even if the bushing were to fail, there is still a mechanical lock that prevents the diff nose from slapping around too much.

 

 

ABOUT THAT,

 

I was thinking the other night......, why doesnt someone throw a stock mount on the TOP of the diff and make a bracket similar to the RT diff mount that straddles the top of the diff, Just use rectangular tubing to mimick the same shape as the front diff crossmember and mount with a thru hole...

 

AND....wah LAH, stock mount on top and stock mount on bottom...., should stop that "lifting" of the nose....

 

 

Just got done checking some clearences here at work, and looks like the stock mount should sit on the top, just needs longer and probably stronger hardware

 

EDIT:

Heres an example of a stock Audi mount and one track density Density Line to get an idea of the final product...

[NZeder]

Yes if they had an interlock setup that would be good. I have/am using interlock mounts now on my engine and gearbox so only the diff left to go

 

See this thread about how the engine mounts I am using are designed inside

 

http://forums.hybridz.org/showthread.php?t=120218

[whitechocolatelove]

any estimation on p and a?

[260DET]

That 'interlock' front engine mount upgrade is a fairly common performance upgrade in Australia, I made similar using rear leaf spring eye bushes off a ute for the 280.

 

For the S30 diff, the original mount may be retained, with an added steel loop over the front. Between the loop and the diff are two/three adjustable rubber bump stops attached inside the loop. With that setup you retain the advantages of the OE mount but prevent the front of the diff moving around under hard acceleration. Even if the OE mount fails completely the diff is not going anywhere.

[olie05]

I would be interested in such a mount for the diff.

[rturbo 930]

i would be interested in such a mount for the diff.

+1

[ktm]

A Ron Tyler diff mount solves this problem.

[olie05]

A Ron Tyler diff mount solves this problem.

 

Yes, but it also involves a bit of fabrication.

 

For me, I don't like spending much time on my car's rear end, since it works GREAT for the low horsepower numbers I'm putting out. However, I would like to have a more solid front differential mounting point than the stocker, hopefully to keep from replacing the soft rubber ones every 5 years.

 

A bolt in solution to this problem would be fantastic. (In my case)

[johnc]

You guys are missing one of the primary diff mount failure modes on a high horsepower S30: The diff cross member cracks and the single stud on the mount tears out of the cross member. Making a stiffer mount will only exacerbate the issue by transferring more bending loads to the cross member's sheet metal. Stiffening the mount is not the solution.

 

The RT mount solves this problem in a very simple and elegant way.

Edited September 14, 2009 by johnc

[Roostmonkey]

Ive got one left if anyone needs it.

[jhm]

RM-

I'll take it!! Already sent you PM.

Thx.

jhm