[2kaccordocoupe]

Hey Folks,
A strange vibration was brought to my attention today. For some odd reason the floor board on the passenger side of my e92 has a vibration under acceleration. Very strange and very noticible only on that side.

Here is a quick summary:
1. Vibration occurs at all speeds above 40km/h while on the gas.
2. Vibration occurs in all gears.
3. If you let off the gas vibration is gone.
4. Does not occur under braking.

So far all I can conclude is that something under throtle load above 40km/h is causing the vibration. Any ideas on what could be causing this? Thanks in advance.

[Session]

Inner or outer CV joint?

Checked the rubber boots if they are intact?

[Nola]

I'm thinking transmission or suspension. Better have it checked. For further insight, have someone drive alongside your car while this is happening looking for visual evidence.

[2kaccordocoupe]

Originally Posted by Session

Inner or outer CV joint?

Checked the rubber boots if they are intact?

My car is RWD not an XI - No CV joint in the front.
If you are sitting in the rear passenger seat you don't feel anything so it's something at the front of the car.

[2kaccordocoupe]

Originally Posted by Nola

I'm thinking transmission or suspension. Better have it checked. For further insight, have someone drive alongside your car while this is happening looking for visual evidence.

I will try the visual check today and let you know.

[2kaccordocoupe]

I had a buddy drive my car and I was in another car. Visually you cannot see anything wrong, wheel spins clean, no wobble, no distortion, nothing that would indicate a vibration.

[Nola]

Then I'm thinking transmission or exhaust since you feel it only when accelerating. Maybe a mount or something. What happens if you apply the clutch but keep the revs while this is going on? Does it stop or keep going? Also, is stregth of the vibration constant, or does it vary with something else like road spped, engine speed, etc?

[dzenno]

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[2kaccordocoupe]

Originally Posted by Nola

Then I'm thinking transmission or exhaust since you feel it only when accelerating. Maybe a mount or something. What happens if you apply the clutch but keep the revs while this is going on? Does it stop or keep going? Also, is stregth of the vibration constant, or does it vary with something else like road spped, engine speed, etc?

Sorry for the delay in responding, I was away for a couple days.
If you apply the clutch and keep the revs up - no vibration
Hold the revs and release the clutch - vibration is back

The strength is pretty consistat all the way through the rev range & car speed.

I called my SA last week to inquire what it could be and they also said it could be a mount. I'm taking it in tomorrow morning, lets see what happens...

Thanks for your help, much appreciated.

[be1ieve1111]

keep us posted.

[2kaccordocoupe]

I took my in this at the crack of dawn this morning, took the shop foreman for a test drive so he would know what I was talking about.

Just got a call back from my SA saying the car is good, they replaced one of the passenger side tranny mounts. I'm going to pick up the car tonight. Will report back.

[Nola]

Hope they fix it good!

[2kaccordocoupe]

Originally Posted by Nola

Hope they fix it good!

Yes they did, the vibration is completely gone.

Thanks again for your help, it saved me alot of time in dealing with the dealer. I told my SA here is what I think is going on and here are tests that were run. Fix it

[dzenno]

Tranny mount already? Didn't expect they'd go that soon...

[2kaccordocoupe]

Originally Posted by dzenno

Tranny mount already? Didn't expect they'd go that soon...

Yeah that was very odd. My SA showed me the old one and it looked perfectly fine, visually it still looked new.

Something in the rubber must have broken down or something. Factory defect

[dzenno]

I recently bought UUC black rubber replacement ones and will put them on..funny how they don't show any damage...

[hipnotic]

take it to the dealer

[acdHQK713K]

Originally Posted by dzenno

I recently bought UUC black rubber replacement ones and will put them on..funny how they don't show any damage...

Did you ever do this? I think I may have a tranny mount issue. Same symptoms as described above almost.

Vibration above 60mph, no vibration when braking. Wheels balanced last week.

Are these tranny mounts a difficult DIY?

[dzenno]

Originally Posted by Stangorang

Did you ever do this? I think I may have a tranny mount issue. Same symptoms as described above almost.

Vibration above 60mph, no vibration when braking. Wheels balanced last week.

Are these tranny mounts a difficult DIY?

I've never gotten to putting them on mostly because the mounts I got felt like they weren't the same firmness or type of rubber...i did look at the ones that EAS sells recently but holding off for now..

[acdHQK713K]

Just replaced mine a few minutes ago. Super easy. About a 30 min job. Just need a 13mm socket and wrench. A short 13mm flex wrench was super useful.

I bought mine from amazon.com at: http://www.amazon.com/gp/product/B001G6J8L4

Torque specs are 19nm for every bolt/nut removed.

Slight improvement in vibration. Worth the $30 and 40 mins for the upgrade.