Aight, i ran searches and found similar topics but i haven't found a thread which i think addresses my particular concern. and i found a somewhat unique factor with my situation which warrants a separate thread. sorry for this long disclaimer but i know people get smart and say "SEARCH FIRST!" so i had to put this out right quick .

so...i feel this vibration in the back of my seat between 40 and 45 +/- mph and it's straight killin' me!!! i took it to the Honda dealer (Acura dealer is 1 hour away) and had them duplicate the problem with me in the passenger seat and i felt the same thing. it's not my rims because i replaced the stock ones (they did have bends) and i had the tires rotated/balanced. Honda said they can't find anything wrong. the thing is, on a full tank of gas with more weight in back the vibration is reduced significantly. which leads me to believe it's coming from the back. this vibration is there constantly at this speed whether i'm cornering or whatever. my car is completely stock other than the rims and they're 17s so i changed nothing from original set up. and this vibration was their before the new rims. it feels like a "thrrrrrr......thrrrrrr.......thrrrrrr........thrrr rrrr" vibration, like every other second, kinda intermittently if that makes sense. any suggestion/similar cases? holla.

 

Do you notice any sounds. It may be a bad bearing, Or it may be the tread on the tires causing it. It may also be a axle/cv joint.

 

Mine was the driver's side axle and cv joint. Something ripped the boot, all the grease dried up, bearings were bad, and the axle was bad. It felt like it was vibrating the bottom of the seat and I couldn't tell whether it was coming from the back or the front.

 

nah, so sounds. just the vibration. the tread thing you mentioned is interesting. at one point i took it to Acura and they added that the directional tires i have may also cause slight vibrations. i have Hankook K106's. they're practically new though.

 

i think i recall reading your thread/response referring to this during my searches. so it ended up being one of your fronts? i'll search for your thread again and inspect my joints.

thanks for the responses homies.

 

How did the original rims get bent? Maybe it's something related to that original damage?

 

just as a thought, are the new rims hub centric? If not they might be causeing vibrations and adpaters may be needed

 

I am going with sandynmike on this one
What caused the original rims to be damaged?
That event could have strained the cv severly!
they dont have to be noisy to fail!

 

yes they are hub centric. it's not the new rims, it did this with the stock ones as well. good thought though

 

I would def say check the Cv joint.Bad tires also could cause vibration and noise.

 

When did you first notice the noise/vibration?
Check TireRack.com or similar and see if folks rated the tires as being noisy.
You could also swap them around or temporarily run like 20 psi in them and see if the noise changes to rule out or confirm the tires.

 

after looking further into this vibration, i noticed that it's still present at pretty much all speeds but just very prevalent at the 40-45mph range. it seems to smooth out at higher speeds BUT i also get a shimmy/shake in the steering wheel at about 60-65mph. i've also been doing some slow speed tests (5-15mph) on smooth surfaces and i seem to feel a wobble going on. it's not my wheels or tires because Honda swapped out a test set and still felt the vibration. is this sounding like a half shaft? oh, and it's not the CV joints, they're fine. the boots are good and i have no noises/clicks when turning.

 

How do you know it's not your CV joints? I mean, you can inspect them to make sure the boots aren't broken where you would lose your lubrication, but couldn't it still be the joints? I've read a few posts where people with similar symptoms solved their problem by changing out their axles (CVs).

My TL has been shimmying for a while and I'm about ready to change both axles because it's pissing me off that I have a nice car that rides like this. I'm still mustering the courage to do it myself, though...

 

When you get into that magic speed range and it starts doing it, keep your foot on the accelerator and pop it in neutral (or hit the clutch) so the engine revs. My vibration disappeared so I knew it was not a motor mount and was only present during acceleration with a tiny tiny bit during coasting so I knew it wasn't a balance issue. The torque from accelerating (or maintaining speed) was causing it to vibrate.

If you wait too long, it breaks and then the differential sends all of the power to broken side...so you just sit there. After I had it fixed, the dealership said mine was so worn and beaten that I was miles away from that happening.

 

Are you talking about the CV joint?

I have the same shaking problem. It only shakes when I accelerate and when it's around 70-80km/h (40-45mph). Initially, I thought my problem was with my worn out upper and lower ball joints. I changed that yesterday but it still shakes.

What else could cause this vibration?

 

Not only was the axle bad, but the boot was torn and all the grease came out so my bearings were bad.

 

So you changed the entire axle plus the bearings?

howmuch did that set you back? I'm really fed up of this shaking, i might bring it to the dealer and have them fix it...

 

$105 for the axle, $150 for labor. I had the dealership do it.

I have a little vibration at slow speeds now.....didn't take it back yet to see if it's related.

 

I'll give this a try. sound like a good DIY test to help narrow down the possibilities.

 

lostchild83, do you feel the vibration in the back/bottom of your seat too? if so then it's the exact same problem i'm having.

 

so about $260 per side, ain't bad at all. if this is my problem i'll get both sides done to make sure all is good. i love the car so i'll dish out $500 to get it smoothed out.

 

I just spoke to my friend. and he suggested it might be caused by the camber. I just installed a camber kit 2 days ago, and I didn't get my car re-aligned yetl. Could bad aligned them and bad camber cause this vibration too?

 

did the camber kit install reduce the vibration?

 

It did a bit.

 

i was noticing a similar thing, it turned out the bearings were gone, and now everything is fine.

for some reason bearings wear out. i have 195 000 km on my 99 TL and all four bearings have worn out, meanwhile my grandprix has 220 000 km and it still has no problem.....

 

You cannot test CV bearing by looking at the boots and listening while turning
Have a mechanic put the car up and test with a stethascope when car running in gear
Dont keep replacing expensive parts without Pro diagnosis- and I mean specialty shop not the dealer.
Lowered and installed camber kit REQUIRES alignment immedialtly

 

I had the same ish happen on my POS pontiac. It turned out that the vibration was only there because i was riding with a pizza cutter for 3 months as a daily driver. I only found out it was the spare that was the problem after the spare blew at 45mph :P

-bah

 

so what about the shimmy/shaking i get in the steering wheel? whats the thoughts on that? i would imaigne a half shaft would cause that.

 

Why guess
Take it to an alignment shop
Most will inspect and advise for little or no$
especially if you have them replace whatevers bad

 

there are actually a few posts on this subject and most of them suggest to replace the axle? 1 quesiton never answered was how to know which axle is bad if not both. anybody care to answer that one? a few others of my own noob self are, if you replace the axle does that include the half shaft and cv( cv joints), bearings or are they separate parts. i was under the impression that they are parts of the axle and when replacing the axle all will be replaced.

 

sorry to revive this old thread but i get the same issues as the OP

but i did this method to see if it still shakes or not, and when i dropped into neutral at 40mph, it still shook, even when on or off the gas....what could my problem be?

and i balanced my winter rims few days ago, so i ruled that out....wheel bearings dont hum or make noise, but just this thur, thur sound/vibration is what u feel...

input appreciated!

 

Does your car vibrate after you've warmed up the tires? I would have your lower ball joints checked and go from there.

 

if anything its been doing it worse now with the cold weather, last night drive right away and started shaking harder, so what i think is that grease soemwhere, in the cv joints or maybe balljoints are dried up and are not flowing properly...thus the shake....ill check out the lower bjs soon but those are new, installed in the summer

 

This might help... vibration and noise trouble shooting guide:

Vibration that increases with speed or kicks in at different speeds
Excessive play in the inner or outer joints or a bent driveshaft
Replace worn shaft assembly

Clunking noise when engaging automatic transmission.
Worn inner or outer joints.
Replace worn shaft assembly.

Continuous knock at low speed
Indicates a worn CV joint
Replace worn assembly.

Continuous humming or growling noise.
Inadequate lubrication on inner or outer joints (check boots for leaks). May also be worn gears or wheel bearings.
Inspect CV joint - replace necessary.

Clunking noise during acceleration or deceleration.
Worn inboard joint or differential problem in the transaxle.
replace worn shaft assembly or repair transaxle as necessary.

Clicking or popping noise.
Worn outer joint.
Replace worn shaft assembly.

Shudder while acceleration or deceleration.
Worn inner CV joint.
Replace worn shaft assembly.

Cyclic vibration.
Worn inner tripod CV joint.
Replace worn shaft assembly.

 

so all in all, replace cv joint lol, i got about 5/7 symptoms.
thanks

 

May as well replace axle assy. then.

 

I"m having the exact same issue. Check the tranny and engine mounts. For my car both front engine and tryanny mounts are gone. I'm going to change them both this week-end. I will let you know if the sound is gone after they are replaced. The thread is called "strange sound coming from front"