Vibration "changed" with new motor mounts

[Theeonlybatman]

Hello all, looking for a little forum help. (yes i searched first)
When i bouoght the car it had a serious vibration for any engine rev over 3500 rpm. After consulting the forum, changing the motor mounts was suggeseted as the car is an )@ RT/10 with just under 18k on it and i can the original owner did very lil maintenance (judged this by the absolutely black air filters i took out of the car).

Upon having the motor and tranny mounts changed to the Hi-Perf V-10 Engine Mounts #220-327-001-11 offered by Snake-Oyl Products, now the vibration is at 2k rpms. The higher rpms are fantastic and car pulls and shifts much better. Just has a strange vibration around 2k rpms. None at idle and once past the 2k range, it goes away.

Is this normal for this product? Any thoughts?

 

[Jack B]

That 2K harmonic has happened to several cars that have changed to the after-market mounts. If the vibration rpm threshold changed, your previous mounts were probably bad. If you search there are multiple people with the same complaint, I am one of them. If I am not going to race for awhile, I just put the oem trans mount back in and the vibration stops. I only changed the trans mount.

 

[uvbnbit]

Seems I've read with the Woodhouse Poly mounts, it takes a few 100 miles to "settle in?". I didn't really notice much when I did mine. But not sure on the Snake Oyl's

 

[TowDawg]

Yep. I've got the Woodhouse motor and tranny mounts in mine, and when I first drove it after intalling them, I thought I had done something seriously wrong. The rear view mirror wasn't even usable it was vibrating so bad right around 2k. Like Chip said, it does settle down after some miles, but I still have a much more pronounced vibration right around 2k. It's much less than it was originally, and you get used to it, so i wouldn't worry too much about it.

 

[NI-KA]

I have had the same problem.

Peaks out at around 2,125 RPM, then tapers back off and is completely gone by about 2,850 RPM. Vibration is not so bad that the mirrors are un-usable. I am using Woodhouse mounts.

 

[steve911]

Seems I've read with the Woodhouse Poly mounts, it takes a few 100 miles to "settle in?". I didn't really notice much when I did mine. But not sure on the Snake Oyl's

SnakeOyl is the company that is now manufacturing and selling the Woodhouse Mounts. Woodhouse/Snakeoyl when it come to mounts are one in the same.

 

[98intrigue]

I have had the same problem.

Peaks out at around 2,125 RPM, then tapers back off and is completely gone by about 2,850 RPM. Vibration is not so bad that the mirrors are un-usable. I am using Woodhouse mounts.

Same for me, except I have a Gen 3. From what I remember, 2k-2.5k rpms were the worst...but it is not even close to being bad enough to rattle the mirror.

 

[slitherv10]

Is it just me or does it seem that someone needs to clean this problem with motor and trans mounts causing this problem. You pay for a product to clean up a problem an it causes another one. Seems pointless really. Unfortunately when you have no choice because of the mounts being worn out, what can you do, but, seriously, the manufactures need to reinvent their product if you ask me. Or, maybe its something else that needs to be done in conjunction to changing the mounts. Don't know but what I do know is it shouldn't be like this.

 

[AZTVR]

After the first *** miles, any noticeable vibration with the new Woodhouse mounts was no longer noticeable. I suspect that you have other factors involved unless there is a lot of manufacturing variation. Perhaps think about changing the trans crossbrace to help change the dynamics of the system ? Just guessing, here, assuming that you don't have engine performance issues.

 

[Able1]

Theeonlybatman, when you removed the mounts did they look bad? When you are driving your car at 2000 rpm did you try letting of the gas and pushing in the clutch to make sure the vibration is coming from the engine and not the drivetrain?If it goes away the vibration is caused by the engine. I would check the torq on your damper pulley just to be on the safe side. Also your belt and other pulleys. I have Woodhouse mounts and they do vibrate more than OEM mounts, but are not unacceptable. The mounts are made to keep the engine in place so it is the nature of the beast, you can always buy OEM. I also have over 3000 miles on mine and the vibration is the same as the day I put them in.I hope you find your problem.

 

[rpm9000]

Does everyone who goes to this type of mount have a vibration problem? I was going to get a set for my car but if vibration is a problem I might pass on them. Right now a have no vibration at any rpm.

 

[TowDawg]

Does everyone who goes to this type of mount have a vibration problem? I was going to get a set for my car but if vibration is a problem I might pass on them. Right now a have no vibration at any rpm.

You do have more vibration than stock, but a much better overall "feel" for the car. Plus the stock ones are junk anyway and will break on you. It's not near as bad it sounds and definitley worth it. It was for me anyway. It's not like the Viper is smooth riding car anyway. lol

 

[Canadian Snake]

Am I to understand these improved mounts would reduce the wheel Hop??

 

[JAY]

Yes they do help reduce wheel hop

 

[Mad Max]

Does everyone who goes to this type of mount have a vibration problem? I was going to get a set for my car but if vibration is a problem I might pass on them. Right now a have no vibration at any rpm.

I've installed the Woodhouse mounts on my Gen II GTS. (All 3) No issues installing like some people have had and no noticeable increase in vibration. I also have installed the billet cross member. Now the shifter really doesn't move at all when on and off the throttle. Huge difference for the better. I would highly recommend.

 

[Axtellboy]

Does everyone who goes to this type of mount have a vibration problem? I was going to get a set for my car but if vibration is a problem I might pass on them. Right now a have no vibration at any rpm.

Woodhouse installed my new mounts on my 98 GTS after installing a Paxton five years ago. I never noticed any increase in vibration although it seems many do, at least initially.

 

[Jack B]

Please exlpain how

Yes they do help reduce wheel hop

 

[JAY]

By minimizing the engine and transmission rocking , you also minimize shocking the tire from breaking loose .Note it doesn't stop wheel hop , but minimizes it . Other posts have mentioned the same in regards to Woodhouse mounts . Hope this helps .

 

[Bobpantax]

The main advantage of the Woodhouse mounts is the reduction of movement between engine and tranny so that shifting is improved. I do not believe they have any direct effect on wheel hop which is situational and related to the tire partially and sequentially grabbing then letting go which results in the hop. There will be more vibration initially but, as others have said, it calms down after two or three hundred miles to a point that is acceptable to most but maybe not to all users. It's a subjective thing. If someone does not require the ability to shift quickly with a bit more certainty, there is no need for the modification.

 

[slitherv10]

I am stumbled at the thought that these and other replacement motor mounts cause this vibration at all. Can someone not make mounts that work as the OEM ones worked with no vibration? Is it that difficult to recreate the same? If anyone knows why the replacement aftermarket mounts cannot perform as did the originals is beyond me. There should be NO vibration whatsoever. Did the original mounts cause that on a brand new car? I doubt it as there would have been recalls for that and numerous complaints.
I think someone needs to engineer some new ones that work as they did from the factory. I for one would not accept such a product as a replacement. You pay the money to get a product that gives you problems from the original?...lol..doesn't make any sense. you change to aftermarket expecting something of equal performance if not better no?

 

[AZTVR]

I am stumbled at the thought that these and other replacement motor mounts cause this vibration at all. Can someone not make mounts that work as the OEM ones worked with no vibration? Is it that difficult to recreate the same? If anyone knows why the replacement aftermarket mounts cannot perform as did the originals is beyond me. There should be NO vibration whatsoever. Did the original mounts cause that on a brand new car? I doubt it as there would have been recalls for that and numerous complaints.
I think someone needs to engineer some new ones that work as they did from the factory. I for one would not accept such a product as a replacement. You pay the money to get a product that gives you problems from the original?...lol..doesn't make any sense. you change to aftermarket expecting something of equal performance if not better no?

The answer to your last sentence is definitely NO. You change because you want the kind of performance that the aftermarket part provides instead of what the OEM provides. Performance factors for motor mounts would include: improvement of shifting, reduction of vibration, cost, availability, appearance, ease of installation. Most "performance" mods compromise one thing for the other vs. OEM.

The motor mounts DO NOT CAUSE vibration. The motor does. The mounts serve 2 purposes. 1. To keep the engine and transmission in position. 2. To provide some amount of isolation between the engine and chassis with respect to vibration. Pure metal mounts would transmit all engine vibration to the chassis. Soft rubber mounts would provide lots of isolation or dampening of vibration; but, the drive train would wiggle all over the place. Any aftermarket mount could be made with whatever characteristic that is desired by the market. OEM mounts compromise on the side of comfort. The Woodhouse mounts compromise on the side of stiffening up the drivetrain-to-chassis connection for better driving performance. If you don't road race or drag race and want OEM vibration performance, stay with OEM.

 

[slitherv10]

The answer to your last sentence is definitely NO. You change because you want the kind of performance that the aftermarket part provides instead of what the OEM provides. Performance factors for motor mounts would include: improvement of shifting, reduction of vibration, cost, availability, appearance, ease of installation. Most "performance" mods compromise one thing for the other vs. OEM.

The motor mounts DO NOT CAUSE vibration. The motor does. The mounts serve 2 purposes. 1. To keep the engine and transmission in position. 2. To provide some amount of isolation between the engine and chassis with respect to vibration. Pure metal mounts would transmit all engine vibration to the chassis. Soft rubber mounts would provide lots of isolation or dampening of vibration; but, the drive train would wiggle all over the place. Any aftermarket mount could be made with whatever characteristic that is desired by the market. OEM mounts compromise on the side of comfort. The Woodhouse mounts compromise on the side of stiffening up the drivetrain-to-chassis connection for better driving performance. If you don't road race or drag race and want OEM vibration performance, stay with OEM.

I understand what your saying in respect to aftermarket mounts compared to OEM ones. I realize that aftermarket mounts have been upgraded as far as their compounds or composition is concerned but, the quality of the aftermarket part compromises the ride quality of the OEM "the vibration" problem which the OEM mounts did not have. Its like saying, buy an aftermarket wheels for your car that look better and are 3 piece units and are much stronger than the OEM ones but,,,and that's but,,,you will have "wobbling" and wheel hop with them. Why would you want them then, why would you want a product as you said above that yes, improves looks, and turning radius or handling...but...but...you wobble and wheel hop because of them?!!...common. .that's not right. You should not be accepting reaction with reaction. You should not have to accept something for what it is if what it does is limited. The OEM motor mounts worked well and did not cause vibration, the new aftermarket mounts work Better, but, cause vibration...lol...that's not a good trade off in my opinion. They improve reaction time, cost, and are easier to install but, you will have vibration from them...lol..that sounds like something drugs say they do. Commercials we see that say, take ****** and it helps your libido but, you could have a heart attack, dizziness, nausea, vomiting, sore muscles, or you could lose your ****** function...lol...that's the trade off...lol...sure it works for what it is intended, but, you will have side effects. Sorry not my cup of tea. Sometimes the results are not worth the reaction.
Just my opinion of course, but, it does seem like I speak for a lot of others as they all seem to complain about the same vibration problem. So if its a common complaint then, it should wake up the manufacture and have them do something about it. I know I would with so many complaints on the same subject.

 

[SRT09]

Or leave the stock mounts and put a torque dampner on the motor?

 

[steve911]

To apply your reasoning along a similar path, it seems to me that you would want the handling of a race car but the ride of OEM. Something that isn't going to happen.

The durometer of the mounts was purposely made harder in order to counteract the compressability of the stock spongy mounts. The more the engine is allowed "roll" in engine bay, the more it affects handling which is why most folks install them. Another reason is the design of the Woodhouse mounts is that they won't tear like the OEM ones can.

If you wanted the aftermarket ones to behave like the stock ones, they would not provide any benefit and then begs the question why would you trade them out in the first place?

Like the old saying goes, you cant have you cake and eat it too.

I am stumbled at the thought that these and other replacement motor mounts cause this vibration at all. Can someone not make mounts that work as the OEM ones worked with no vibration? Is it that difficult to recreate the same? If anyone knows why the replacement aftermarket mounts cannot perform as did the originals is beyond me. There should be NO vibration whatsoever. Did the original mounts cause that on a brand new car? I doubt it as there would have been recalls for that and numerous complaints.
I think someone needs to engineer some new ones that work as they did from the factory. I for one would not accept such a product as a replacement. You pay the money to get a product that gives you problems from the original?...lol..doesn't make any sense. you change to aftermarket expecting something of equal performance if not better no?

 

[Heysie]

When using the "94 RT/10 for road racing on the circuit, I had a lot of problems shifting from 4th to 5th gear.
So Í installed the 3 Woodhouse motormounts.
Last saterday I had a trackday, but somethimes I still had problems with shiftig to 5th gear.

Thera are also more vibrations in the car, but can still use the rearview mirror.

 

[slitherv10]

To apply your reasoning along a similar path, it seems to me that you would want the handling of a race car but the ride of OEM. Something that isn't going to happen.

The durometer of the mounts was purposely made harder in order to counteract the compressability of the stock spongy mounts. The more the engine is allowed "roll" in engine bay, the more it affects handling which is why most folks install them. Another reason is the design of the Woodhouse mounts is that they won't tear like the OEM ones can.

If you wanted the aftermarket ones to behave like the stock ones, they would not provide any benefit and then begs the question why would you trade them out in the first place?

Like the old saying goes, you cant have you cake and eat it too.

As you can see with the below comment, sometimes your theory is incorrect. most that install these mounts are regular drivers on the street. The amount of street cars vs the track cars that can accept the vibration for performance is very small. If the manufacture was depending on the tracked cars to make money on their mounts, thy would go broke. It sobvious that that theory doesn't apply either as the gentleman below took it to the track with new mounts installed and still gave him problems with vibraton and sticky gears.
There is no point in making mounts that help in one area and cause problems in another. I personally would rather change to OEM mounts or any similar aftermarket ones that don't vibrate and change them out every 15 years as they do last for a long time depending on conditions. For the small amount of guys using their cars for track use, yes, I agree, they should go aftermarket mounts , but, for the guys who don't use their cars for track use, why would you compromise ride quality for mount performance and durability when you will get no vibration and durability that will last over 10 years which is good enough for me.
Just sayin...makes sense no?
Its like saying, buying an aftermarket exhaust will flow better and better performance but, will vibrate the car and will be unbearably loud . Too many people would not go that route for daily driving,but, yes, track guys would love it.

When using the "94 RT/10 for road racing on the circuit, I had a lot of problems shifting from 4th to 5th gear.
So Í installed the 3 Woodhouse motormounts.
Last saterday I had a trackday, but somethimes I still had problems with shiftig to 5th gear.

Thera are also more vibrations in the car, but can still use the rearview mirror.

 

[rpm9000]

I installed Woodhouse motor and transmission mounts yesterday. My left motor mount was bad and the transmission mount was bad also. The car now shifts much better and with no noticeable vibration. It seems to have helped stop the wheel hop problem also. I am very pleased with the outcome.

 

[Camfab]

Slither, I understand your point, however the issue with the OEM mounts is that they sag a tremendous amount. If you replace the OEM mounts with another set as I did initially you will notice that the mounts distort and sag like crazy within a few months. Yes they do an excellent job of minimizing perceived engine vibration, but it comes at a cost of potential shift quality issues as well as reduced u joint life in your driveshaft. I think the cars with wheel hop issues may have a broken engine mount, trans mount as well as a differential that is not securely in place. There could be a number of reasons for these issues................abuse, normal wear and tear, or both. Anyway, that's why we have a forum, now that your informed, it's just one less unhappy customer and one less complaint the seller has to deal with. Different strokes for different folks.

 

[AJ02]

I had a broken driver's side motor mount and switched to the Woodhouse motor and trans mounts. No vibration at all, better shifting and no shifter movement when going from acceleration to coast and back. 100% gain for my car!!

 

[ViperTony]

Both of my OEM mounts was separated and each of my shocks was set to a different rebound setting from the factory. Wheel hop was a problem. Adjusted the shocks and most of the wheel hop was eliminated. Replaced the engine mounts with Woodhouse mounts and wheel hop is no longer. I installed the mounts in 2009. There was a little vibration initially but it wasn't enough to make me cry about. The vibration went away as the mounts settled in.