Vibration at different speeds


billg13
07-31-2004, 11:15 AM
I just bought a 93 J30. I found one problem. At 28 mph the steering wheel starts to vibrate. It actually feels like the entire car but I can see it in the steering wheel. It starts to subside arournd 32 but at 40 mph it starts again but this time I do not see the vibration in the steering wheel. It feels like it is comeing from the rear or the middele of the car. The extra compartment that is your right arm rest, starts to rattle. I have moved all the tires around thinking it was just a bad tire or balancing. I'm wondering it it could be motor or transmission mounts or something to do with the drive shaft. It seems to feel like a similar vibration I may have felt when univeral joints went bad on old drive shafts. I have not taken this into anyone to look at yet. I was just wondering if anyone had anything similar to this. One other thing. You feel the vibration when you accellerate through these speeds or when you decellerate by letting the car coast. The car rides pretty smooth at around 60 mph and higher. But it rides perfectly smooth under 25 mph.

infinman
07-31-2004, 12:42 PM
Have your driveshaft u-joints checked.{common problem on J's}You may have to take the shaft to a driveline specialist as others will try to sell you a complete driveshaft.{u-joints are normally non replacable}.
Good luck

Underground_Killah
02-21-2005, 02:18 PM
where is that located?

billg13
02-21-2005, 03:02 PM
If you are asking where the vibration is located, it seems to be about the center of the car. The storage box on the center consol (by my right elbow) starts to rattle a lot around 42 MPH. It goes away at hight speeds. I was taking into a shop this Wed to see if they can figure it out.

Underground_Killah
02-21-2005, 10:56 PM
oh i meant the place to check for it.. cause i got it too

billg13
02-22-2005, 07:47 AM
The universal joints connect parts of the drive shaft together. Drive shafts ran from the transmission to the rear end and are only on rear wheel drive cars. I am going to try and get my car looked at by a machanic on Wedneday. I will let you know what I find out.

Underground_Killah
02-28-2005, 10:31 PM
it's past wednesday... what's up?

billg13
03-03-2005, 08:41 PM
Sorry it took me so long. The shop told me that there was a large back rubber part that is between the drive shaft and the transmission. It has six bolts in it. They said it was shaking like made at 42mph. They were not sure if it was this rubber part of the transmission. They told me to take it to a drive train place. I decided to do nothing. This isn't good. I was expecting it to be a U-joint. I have no plans to fix it right now. Please let me know if you have the same problem.

Underground_Killah
03-03-2005, 09:26 PM
hmmm you may also want to get your tires rotated and balanced... it helped mine go away

Nahkapohjola
03-04-2005, 01:23 AM
Sorry it took me so long. The shop told me that there was a large back rubber part that is between the drive shaft and the transmission. It has six bolts in it. They said it was shaking like made at 42mph. They were not sure if it was this rubber part of the transmission. They told me to take it to a drive train place. I decided to do nothing. This isn't good. I was expecting it to be a U-joint. I have no plans to fix it right now. Please let me know if you have the same problem.


Get it fixed before the axle explodes out through u floor. I would not drive even behind u... floating bomb.

Swap the rubber support and joint... or walk.

billg13
03-04-2005, 07:57 AM
You make it sound very serious. Is this a common problem with these older J30s. Have you seen this before and do you think the machanic is correct.

infinman
03-04-2005, 10:53 AM
I've seen alot of bad u-joints on J30's.You need to remove your driveshaft and carefully inspect the u-joints function by checking for binding.I guarantee you'll find a bad joint.Like I said we at the dealer{the technicians many people slam} change the whole driveshaft{we didn't design this stuff}.But you can take your driveshaft to a driveline specialist and the joints can be changed.

billg13
03-04-2005, 07:59 PM
thanks. I appreciated your feedback

Nahkapohjola
03-06-2005, 03:46 AM
You make it sound very serious. Is this a common problem with these older J30s. Have you seen this before and do you think the machanic is correct.


- Rotating steel axles are seriusly dangerous. Read about the peole in wheelchairs... I mean those still living.

- Racing people who want to live, make these axles of carbon fibres. When they break, they burst to dust, no harm done. Rotating loose steelbars take a missile orbit... pls get u car off the road now!

- Have not seen. REALLY do not want. Have replaced always the supports, joints beforehand, balanced if necessary [not cheapo]...

- Dunno of a specific mechanic. But its like doctors, will not beleive one. Never. Also I am not asking u to beleive me, but check out, return to top.

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