Jerky Vibration on acceleration

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satianv
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Post Sat Nov 12, 2005 6:58 am

I just got my E30 recently and I am in New Zealand. Well the issue is when I go pass the 90Km/h mark the car seems to go into a massive vibrating frenzy. This is real bad shuddering thats felt throughout. Initially I thought it was the tyres but I think this isn't the case. When I stop accelerating even at higer speeds the vibration stops.


Any idea where Ii should start looking...also noticed some fluid weep on the steering boot cover...any relation to this issue?
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Brianmoooore
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Post Sat Nov 12, 2005 12:20 pm

Worn control arm bushes cause vibrations at certain speeds, but check track rod ends as well.
If this is a power rack, and the end bellows have steering fluid in them, then your rack is dying, but I doubt if this is anything to do with the vibration.
glenn
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Post Sat Nov 12, 2005 4:20 pm

also try having a look at the prop.
the centre bearing or one of the uj's could be worn.
gareth
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Post Sat Nov 12, 2005 6:10 pm

my money is on the rubber guibo coupling on the front of the prop...

also, give the rear wheel bolts a check to be on the safe side!
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Brianmoooore
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Post Sat Nov 12, 2005 7:01 pm

I read the OP as vibration felt through the steering wheel, but if it's general vibration throughout the car, then gareth and/or Glenn could be right.`
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satianv
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Post Fri Jan 06, 2006 8:01 am

Sorry guys have been away for awhile , there is some more infor pertaining the vibration. As I was driving today I noticed that the problem only occurs when the gear shift takes place at about 85Km/Hour. When the gear drops the vibration goes away.

As I am currently also facing down shift problems when the tranny is cold, I am just wondering if these two are inter- related. Could it possibly be a broken gear tooth or something?
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satianv
E30 Zone Newbie
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Posts: 12
Joined: Wed Oct 26, 2005 11:00 pm

Post Sun Jan 08, 2006 12:24 am

Sorry guys have been away for awhile , there is some more infor pertaining the vibration. As I was driving today I noticed that the problem only occurs when the gear shift takes place at about 85Km/Hour. When the gear drops the vibration goes away.

As I am currently also facing down shift problems when the tranny is cold, I am just wondering if these two are inter- related. Could it possibly be a broken gear tooth or something?.

I am trying to figure out if it would be more worthwhile for me to just swap the transmission out or should I overhaul it?.