How to disassemble drive shafts? - Alfa Romeo Forum
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How to disassemble drive shafts?

Im taking away the gearbox on my 147 1.6ts and now im at the point of taking away the drive shafts but Im not sure how to do it, I have in front of me two kind of bolts, allen and hexagonal.
I dont want to change anything, just to take away.

Can somebody explain how to do it? thanks!
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Go from the Allen end. The nut is actually locked by a flat on the drive flange. Only when the bolt is really loose does the nut turn.

Not sure what you are doing, but it might be easier just pull the whole shaft out of the differential. Gearbox end shaft is held in by a circlip (just yank or pry it out), and the engine end is held in by the cross shaft bearing.
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Go from the Allen end. The nut is actually locked by a flat on the drive flange. Only when the bolt is really loose does the nut turn.

Not sure what you are doing, but it might be easier just pull the whole shaft out of the differential. Gearbox end shaft is held in by a circlip (just yank or pry it out), and the engine end is held in by the cross shaft bearing.
Really just pulling It comes to me? Just so? Maybe i have to do It stronger...I thought I had to unbolt something.
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As rxe stated, you could unbolt the driveshaft at the 6, 6mm Allen bolts which would later need a 10mm? spanner to stop the nuts from turning.

It is not possible to just pull the driveshaft assembly out of the gearbox. It would need a prybar with a firm, sharp force to displace it from the differential. It would loose gear oil doing so, so have a basin nearby to catch the gear oil. It will be dirty, so refill with quality fluid of 75W/80 or 75W/85 of GL4 quality, I'm sure. Fuchs is recommend (Sintofluid or Sintopoid).
A JTD should need 2.25 litres to change.
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As rxe stated, you could unbolt the driveshaft at the 6, 6mm Allen bolts which would later need a 10mm? spanner to stop the nuts from turning.

It is not possible to just pull the driveshaft assembly out of the gearbox. It would need a prybar with a firm, sharp force to displace it from the differential. It would loose gear oil doing so, so have a basin nearby to catch the gear oil. It will be dirty, so refill with quality fluid of 75W/80 or 75W/85 of GL4 quality, I'm sure. Fuchs is recommend (Sintofluid or Sintopoid).
A JTD should need 2.25 litres to change.
I Will change the gear oil anyway, I want yo change the clutch slave cilinder, so...whats the faster and easier way to take away the driveshaft?

As far I understand I have to take away allen nuts, no?

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Faster and easier is whole shaft assembly out. It does away with need to separate shaft by removing Allen bolts. The downside is that damaging the driveshaft oil seal in differential housing is possible though not likely.

If going to all that trouble, 2 driveshaft seals is probably a good idea but they are not leak prone seals (unlike Peugeot/Citroen).
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Originally Posted by Fruity View Post
As rxe stated, you could unbolt the driveshaft at the 6, 6mm Allen bolts which would later need a 10mm? spanner to stop the nuts from turning.

It is not possible to just pull the driveshaft assembly out of the gearbox. It would need a prybar with a firm, sharp force to displace it from the differential. It would loose gear oil doing so, so have a basin nearby to catch the gear oil. It will be dirty, so refill with quality fluid of 75W/80 or 75W/85 of GL4 quality, I'm sure. Fuchs is recommend (Sintofluid or Sintopoid).
A JTD should need 2.25 litres to change.
Depends on the strength of the circlip - Ive got one that will come out with a sharp tug, and others that need a pry bar under the drive flange, quick whack with that and out it comes. Yes, drain box oil first!
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Depends on the strength of the circlip - I’ve got one that will come out with a sharp tug, and others that need a pry bar under the drive flange, quick whack with that and out it comes. Yes, drain box oil first!
Do you know which allen key do i need to take away the gearbox oil screw?
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Do you know which allen key do i need to take away the gearbox oil screw?
No - I have a set of sump plug tools and simply use the one that fits! 13 mm or so I would guess.
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No - I have a set of sump plug tools and simply use the one that fits! 13 mm or so I would guess.
Thank you!

another question, is it necessary to dismount the sub-frame to take away the gearbox?

And,Is it necessary to unplug the long drive shaft? Or just pulling the gearbox it will stay at its place?

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Some people claim that you can get the box out without removing the subframe - I have never managed this, and I don't see how to do it!

If you pull the gearbox, the long shaft will just slide out - but you need to check that you can move the box sideways enough to release it. i know you can do this in a 166 (loads of space) but I've never tried in a 147.
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