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        General >> Problems >> Bad vibrations
        
(Message started by: nobbel on Jan 24^th, 2011, 10:44am)

Title: Bad vibrations
Post by nobbel on Jan 24^th, 2011, 10:44am

Hi,
since I replaced my automatic gearbox in 2009 I can feel vibrations coming from the rear of the car. Vibration starts at 45mp/h. They have a higher frequency than bad balanced wheels an do definitely not depend on a bad rim. The centre bearing of the driveshaft was replaced when changing the auto-box. Left and right driveshafts where replaced in 2010 because they were worn. There is no abnormal noise which points to bad wheel bearings. The wheel bearings do not make any noises when the car ist on the lift and I turn the wheels by hand. The universal joint at the end of the driveshaft seems to be good.

I can feel the vibrations at my seat alittle bit and best sitting on the rear seats. They cannot be felt when touching the shifter.
Any ideas?

Title: Re: Bad vibrations
Post by Cosray on Jan 24^th, 2011, 11:16am

Sure, had them myself: http://www.fordscorpio.co.uk/cattle.htm

HTH
Ray

Title: Re: Bad vibrations
Post by nobbel on Jan 24^th, 2011, 4:41pm

Hi,
thanks for the answer, but that doesn't match the problem. I have constant vibrations with, I think, no connection to the auto-box. There seems to be a relation between the vibrations and the main drive shaft. Could probably a fault caused by screwing in the bolts of the universal joint in a wrong way. Or even the universal joint itself.
I'll put the car on the lift the next day and have a sharper look on these parts.
Greets
Werner

Title: Re: Bad vibrations
Post by Cosray on Jan 24^th, 2011, 7:36pm

Well, as long as you know what it's not - you're halfway down the solution, no?

Elimination is the word -

HTH
Ray

Title: Re: Bad vibrations
Post by gozz on Jan 24^th, 2011, 9:16pm

Werner.
Check for lift ie up and down movement in the diff output shafts indicating worn diff side bearings.
GOZZ.

Title: Re: Bad vibrations
Post by nobbel on Jan 25^th, 2011, 6:42am

;D Where is my crowbar?

Title: Re: Bad vibrations
Post by Snoopy on Jan 25^th, 2011, 8:31am

The bolts on the UJ joints have to be fitted back in the same location as they are balanaced. Its in the PDF on the main site. Fitting in the wrong order can cause the syptoms you have described. ITEM 14 (http://www.fordscorpio.co.uk/manual/autotrans/A4LDE24V.pdf)

Title: Re: Bad vibrations
Post by nobbel on Feb 15^th, 2011, 7:48am

Hi, I've changed the main driveshaft and - no more vibrations! By the way: the universal joint was in good condition and the middle bearing as well. Vibrations caused by gremlins???
Thanks for your help.
nobbel

Title: Re: Bad vibrations
Post by amigafan2003 on Feb 15^th, 2011, 2:23pm

on 02/15/11 at 07:48:46, nobbel wrote:

Do you mean the propshaft?

Title: Re: Bad vibrations
Post by nobbel on Feb 16^th, 2011, 6:58am

Sir yes sir, the propshaft.

Title: Re: Bad vibrations
Post by amigafan2003 on Feb 17^th, 2011, 2:40pm

2nd hand or brand new prop shaft?

i think I have the same kind of vibratiion on my cossie.

Title: Re: Bad vibrations
Post by nobbel on Feb 18^th, 2011, 9:12am

it was the propshaft of my previous 2,0 16V.