Driveshafts and droning - Alfa Romeo Forum
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(Post Link) post #1 of 6 Old 08-06-15 Thread Starter
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Driveshafts and droning


The last few times I've been out in the car I've noticed a droning noise while driving along. My initial thought was that it was a split turbo pipe or that the exhaust was blowing somewhere.

I've checked the VNT hoses (replaced with silicon ones a few years ago) and the upper and lower turbo hoses but can't find anything. I've also checked along the exhaust but can't spot anything obvious there either.

While under the car I saw leaking oil around the gearbox area (this is where I'm likely to get some terminology wrong so bear with me).

The oil appeared to be coming from where the black thing circled in the piccys below (driveshaft boot?) meets what I think is the gearbox. The yellow arrow indicates where they meet and where I think it was coming from;

Piccy 1

Piccy 2

I pulled the black thing in the direction of the red arrow (away from what I think is the gearbox). It slid away easily revealing what I think is the bare driveshaft and more oil trickled out! I quickly pushed it back into place to stop more from coming out.


Am I right in thinking these things are gearbox, driveshaft and driveshaft-boot?

Should the boot slide away so easily? If so should oil be able to readily escape from there?

Would a gearbox low on oil cause a continuous droning noise when driving along (most noticeable at certain speeds)?

The car had a new clutch a couple of months back, could this be related in some way?


Last edited by ecnarfi; 08-06-15 at 09:55.
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The drive shafts can pull out, but quite that easily. So your drive shaft seals are perished. Your gearbox is now low on oil and should be resolved. Ask to have new seals fitted and the oil filled up
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(Post Link) post #3 of 6 Old 08-06-15 Thread Starter
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Thanks for the comments.

When I spoke to the local Alfa specialist he said pretty much the same as you, although was unclear on whether it would have been the cause of the noise.

I'm taking it in tomorrow for a gearbox oil top-up (is this easily accessible, if so I'll do it myself instead) and it's in for an MOT next week so will have the drive-shafts properly sorted then (don't need to use it much between now and then).

Any idea of the rough cost of sorting driveshaft seals? Is it a 10min job with the right tools needing a 10p washer? Or is it 6 hours labour needing custom shaped parts, milled from purest unobtainium???

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Gearbox fill point can be got to without too much hassle....

Easiest with the battery out, then reach right down behind the engine and under the power steering header tank until you find the gearbox dipstick... Pull this out, and you fill through the dipstick hole.. You'll need a funnel and a length of hose to get down there to it, other than that it's a pretty simple one!

No idea about drive-shaft seals though, good luck getting that sorted!
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Parts are quite cheap, seals less than 10 see Alfa Romeo 156 Differential.
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(Post Link) post #6 of 6 Old 18-06-15 Thread Starter
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I managed to top up the gearbox oil myself last week (battery out, small funnel in dip stick, big funnel with hose down to small funnel - Top tip; tape a cane along the length of the hose to make it easier to direct and hold in position).

Car was in for its MOT yesterday and a check over of the symptoms.

The droning appears to be the nearside rear wheel bearing.

The bit of the driveshaft I can move appears to be caused by a missing circlip from when the clutch was replaced a couple of months ago the garage have agreed to sort that and replace the seals for nothing

And the MOT passed with only a couple of advisories.

All in all, mostly good news
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driveshafts , droning

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