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Author Topic: Drive shaft vibrations  (Read 335 times)

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Vega

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Drive shaft vibrations
« on: 16 April 2018, 08:46:15 »

I need some help with this problem.
Omega Y32SE 2003 automatic.

I changed the center bearing and the center support of the drive shaft, because the rubber mounting was not good anymore and now I have more vibration then before.

Things I changed after.
The two donuts where already replaced
Two drives shaft flex discs (was planned)
Engine mounts (was planned)
Gearbox mount (was planned)
The differential rubber mounts 3x (was planned)
The two horseshoe mounts, now in PU (was planned)

All this did not change anything about the vibration.

I removed the drive shaft and let it balance, drive shaft had further no defects.
Still vibrations after this action.

Next thing we did is to move the center support bearing so far as possible to the right (passenger site, for you driver site) but there is not much room but the vibration changed, not gone.
It looks like that the output shaft from the gearbox is to far to the right, is there room in the engine and gearbox mounts (or sub frame) to correct this and move the complete engine and gearbox to the left?

I did drove several saloon/estate Y26SE and Y32SE models and all of them had vibrations when taking off.

Previous I had an estate X25XE and my friends drive a X30XE and these models did not have any drive shaft vibrations after changing the drive shaft support bearing.

What is the or is there a difference in the X engine and the Y engine drive line.

If anyone has useful tips for me please let me know.
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Re: Drive shaft vibrations
« Reply #1 on: 16 April 2018, 09:53:28 »

If an engine mount and/or gearbox mount fails, then the driveline will end up on the piss...

Neither mountings particularly enjoy being coated in oil for very long. But even with two failed, the engine won't actually fall onto the floor, but you can feel the engine moving around enough to knock under cornering loads...
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Vega

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Re: Drive shaft vibrations
« Reply #2 on: 16 April 2018, 11:06:32 »

If an engine mount and/or gearbox mount fails, then the driveline will end up on the piss...

They are new, like all the other parts that were replaced for new ones.
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Re: Drive shaft vibrations
« Reply #3 on: 16 April 2018, 13:35:42 »

Because you've, changed the diff mounts for a poly,.. the rubber was a good insulator,.  Am guessing you also have poly donuts too, ..

Wheels out of balance,propshaft out of balance.
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Vega

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Re: Drive shaft vibrations
« Reply #4 on: 16 April 2018, 14:00:06 »

Because you've, changed the diff mounts for a poly,.. the rubber was a good insulator,.  Am guessing you also have poly donuts too, ..

Wheels out of balance,propshaft out of balance.

No

Quote
I removed the drive shaft and let it balance, drive shaft had further no defects.
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deviator

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Re: Drive shaft vibrations
« Reply #5 on: 16 April 2018, 14:18:53 »

Beach Boys in the boot?  :D
« Last Edit: 16 April 2018, 14:23:02 by deviator »
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Kevin Wood

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Re: Drive shaft vibrations
« Reply #6 on: 16 April 2018, 14:22:37 »

Beech Boys in the boot?  :D
Does it matter what type of wood they're made from? ;)
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deviator

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Re: Drive shaft vibrations
« Reply #7 on: 16 April 2018, 14:23:23 »

Beech Boys in the boot?  :D
Does it matter what type of wood they're made from? ;)
Don't know what you mean  ::)
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