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Old 03-09-2002, 19:36   #1 (permalink)
ben
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60 or 115

when cruising at either 60-65kmph or 112-114kmph theres nasty shudder/roughness that comes randomly as if the road isnt smooth

just wondering, is this my diff/tailshaft/wheel bearings/suspention......or is it time for a new engine again ?

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Old 03-09-2002, 19:45   #2 (permalink)
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that is a bit worrying...

manual or auto?
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Old 03-09-2002, 20:21   #3 (permalink)
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is that is the same gears or are you in a lower gear when cruising at 60 ?
just wondering if its rpm dependant.
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Old 03-09-2002, 22:52   #4 (permalink)
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Ben, I had a vibration problem that drove me crazy for almost 2 years. I once felt the same vibration in an EL my father was test driving. It ended up being the tail shaft.

It was not normal tail shaft vibration (I changed 3 sets of universal joints during the process), rather it would give a slight vibration at only certain speed(usually 80-85km/h), reguardless of rpm. And it was worse with more weight in the car.

Anyway, to cut a long story short, check out your tail shaft. Should not be more then $20 from a wrecker.
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Old 03-14-2002, 15:55   #5 (permalink)
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Could be the tyres? Buy a set of decent tyres and have them fitted and balanced.
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Old 03-15-2002, 23:55   #6 (permalink)
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Phaseing

Ok Ben you probably won't believe me but your tail shaft might be out of 'phase'.Whats 'phase' you say,the difference in angle of the uni joints(more so where they are mounted to the tailshaft).If the unijoints, say the ones on the actual shaft are in line with each other then they are 'in phase'.If they are at different angles to eachother then they are 'out of phase'.If you have been putting up with this for a while then it has probably been there since new and thats how the factory made it.You could try reversing what you have with your tailshaft,going from 'out of phase' to 'in phase' but this means the tailshaft has to be cut and re-welded and then balanced,pricy or you do what Bass suggested and try a wrecked one.If this does not work then try removing the flanges and rotate them 90 degrees and see how it goes.But the down side is that you will probably **** the uni's.

These are my thoughts anyway.
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Old 03-16-2002, 01:47   #7 (permalink)
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Re: Phaseing

sorry to sound stupid

but in order to understand this, i really should what a uni joint is.....anyone ?

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Old 03-16-2002, 09:57   #8 (permalink)
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Re: Phaseing

A universal joint is a connection between 2 axles that is 'flexible' and can be moved in any direction while still transmissing power from one to the other. It is an essential part of the hardware of a FWD car which has to drive and steer with the same wheels.
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Old 03-16-2002, 10:20   #9 (permalink)
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Re: Phaseing

I'm not sure on this but I thought those were Constant Velocity joints that are used to transmit power and turn. A Uni joint can only move in one direction, where as a CV can go up and down and turn left and right at the same time

Ben - The uni itself is the Cross shaped looking thing at either end of the tailshaft

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Old 03-16-2002, 10:22   #10 (permalink)
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Re: Phaseing

Actually that sounds about right. I stand corrected.
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