prop shaft vibration

[ALF750]

Old chestnut, I last did mine (75TS) about 35kkm ago/18years, and just checking it over for rego I seee a chunk missing from the front one, again!   Yes, had some vibe but nothing extreme, but doesn't get driven much recently.   What is the latest on finding replacements in Oz?   Or is O/S or ebay the best option?   Anyone have the full story on BMW giubo conversion?

[sudsy]

All of these replies and comments are both ultra helpful and yet more worrying that I had initially considered..

This sedan has by no means been neglected, in fact it has been pampered by all accounts..and as such it may be just the one donut/retaining bolt/centre bearing..

But good to know to doubly ensure everything is marked prior to any disassembly..

[sudsy]

So.... looking through the car's service records..It look like the front doughnut had been done in 2014.

Problem is, it was not done by an Alfa specialist.

Also replaced at the same time  was the bell housing (damaged) and flywheel.

Two years earlier (2012), the same mechanic replaced (amongst other things) "Front and rear Uni Joints"

It could be deducted that the 2012 work may have been done incorrectly (not marked up before disassembly), and as a consequence, two years later thrown the new front doughnut (uni joint) and damaged the flywheel and bell housing in the process..

Now, what I may currently be experiencing is an out of balance shaft from this badly installed (second) new front doughnut/uni (2014), and/or the "new" (2012) rear doughnut..

I feel like Miss Marple, stringing together the clues and history of events.!!

Time for my friendly local Alfa guy to have a look over it..

...Other parts required and local prop balancing shop availability aside, once the assembly is removed  what should I expect to shell out to have the prop shaft et al re-trued..??

[bazzbazz]

I feel like Miss Marple, stringing together the clues and history of events.!!

More of a Hercule Poirot I reckon. 

[carlo rossi]

oki if the rubbers seem tio be in good shape
check that the bolts are all the same shape and length
if this is all good then go to my blog balancing tailshafts
alot of trial and error but it does work
im using this method currently until I need to change the rubbers
but from what you have said and if the guy did a poor job on the fron which it sounds like he did
he may have changed the front half of the tailshaft due to the danmage or if he didnt it would be bent
and think its likely of the first new half
now if this is the case they wont have balanced them
go immediately to my blog in the 116 section it will work

http://www.alfaclubvic.org.au/forum/index.php?topic=19303.msg110461#msg110461

[sudsy]

That balancing thread is great info..

I'm incentivised to give it a whirl based upon a $2k balance job.!!

My Alfa guy will do the preliminary checks first..
He's having a look  at it 19th Dec..

Might get lucky with a loose bolt or two..

[sudsy]

So my friendly local Alfa guy had a good look over the propshaft

Good news is that all doughnuts are fine...and all bolts etc are tight..

He is suggesting maybe a problem with the propshaft olive or an untrained  propshaft reassembly (as per previous post detective work).

There's at least one thread on AlfaBB on the olive subject..

https://www.alfabb.com/threads/output-shaft-olive-repair.192551/

Any pearls of wisdom from this hemisphere?

All that said ...Oddly though, the problem has diminished quite a bit since car was on the hoist...or it could be just me, as I feel at least its been looked at and the perishables have been given the all clear...