C70 S70 V70: - worn drive shaft?

Step · Sep 30th, 2009, 20:13

I have been told that the clunk heard when changing from drive to reverse or back ( V70 auto) is due to a worn drive shaft. How serious is this and how likely is it to fail completely? Thanks.

dooby · Sep 30th, 2009, 22:10

Hi,

was it definitely drive shaft? I ask as I don't know much about the All Wheel Drive cars, so if they said prop shaft then whatever I say next will probably be rubbish :-) Would help if you give us a bit more info about the car, either in your signature (appears below your posts) or in your profile. For example engine type, year, etc.

Anyway, a clunk going from drive to reverse (or vice versa) is quite often a sign the auto box fluid is getting past its best. If you do a search on here you for the words auto and flush you should find lots of info.

If they really do mean drive shaft I guess there's a few possibilities:

1) The drive shaft splined end is rocking in the diff. This would probably be wear and tear and would be unlikely to fail completely in the short term I'd say. The fix would be a new driveshaft, see 3 for details.

2) The diff itself has play in it. Again, probably not going to catastrophically fail but it's an almost impractical job to fix it as it would mean removing the gearbox to replace the diff.

3) There's play in the CV shaft (probably inner, else you'd get clonking on full steering loc). This is again unlikely to fail completely in my opinion (the noise it'd be making all the time if it was failing badly would be unmissable and not only reverse-drive). This could be fixed by replacing the drive shaft. Not a bad job, can be done on your own drive with sufficient DIY mechanics tools/ability.

That's just a few of my thoughts, maybe others have different advice.

HTH, Pete

Flingel · Oct 1st, 2009, 08:30

Had this on the C70 (manual), not long after purchasing.
It was done under warranty so I'm a bit vague about what they did.
AFAIK they changed the drive shaft bolts for XC70 ones. And glued (?), their word, I presume loctited the shafts/bolts.
Been fine for over 18months, 12k miles now.

Tel.

charlotte001 · Oct 1st, 2009, 23:02

Are you sure its drive shafts and not an incorrectly adjusted box? As the adjustment from P to D or N to D may not be correct leading to a clunk when you take up drive a good way to tell is stick the car in reverse drive for a few feet see if the clunk is still there if not its an incorrect auto box adjustment

The drive shafts will fail completely eventually but when a garage refers to a worn drive shaft what they normally refer to is either

The splines that slot into the hub or the gearbox which is a major problem especially if the splines are worn at the box end as the internal mating splines could also be worn leading to a new box or at best serious work on the gearbox.

Support bearings on the drive shafts which if they fail could allow the drive shaft to move in any direction destroying the CV joint and or the splines as the shaft moves under the damaged bearings.

If its an AWD/4x4 its mostly the internal splines that wear our as all the shafts rotate eventually winding up [common in 4x4s like landrovers] easy cure simply lift the car up and allow the shafts to unwind

Sep 30th, 2009, 20:13	#1
Step New Member Last Online: Oct 2nd, 2009 07:39 Join Date: Sep 2009 Location: Cardiff	worn drive shaft? I have been told that the clunk heard when changing from drive to reverse or back ( V70 auto) is due to a worn drive shaft. How serious is this and how likely is it to fail completely? Thanks.

Sep 30th, 2009, 22:10	#2
dooby Forum Support Team Last Online: Jul 5th, 2019 16:11 Join Date: Mar 2006 Location: Cambridge View Photos By: dooby	Hi, was it definitely drive shaft? I ask as I don't know much about the All Wheel Drive cars, so if they said prop shaft then whatever I say next will probably be rubbish :-) Would help if you give us a bit more info about the car, either in your signature (appears below your posts) or in your profile. For example engine type, year, etc. Anyway, a clunk going from drive to reverse (or vice versa) is quite often a sign the auto box fluid is getting past its best. If you do a search on here you for the words auto and flush you should find lots of info. If they really do mean drive shaft I guess there's a few possibilities: 1) The drive shaft splined end is rocking in the diff. This would probably be wear and tear and would be unlikely to fail completely in the short term I'd say. The fix would be a new driveshaft, see 3 for details. 2) The diff itself has play in it. Again, probably not going to catastrophically fail but it's an almost impractical job to fix it as it would mean removing the gearbox to replace the diff. 3) There's play in the CV shaft (probably inner, else you'd get clonking on full steering loc). This is again unlikely to fail completely in my opinion (the noise it'd be making all the time if it was failing badly would be unmissable and not only reverse-drive). This could be fixed by replacing the drive shaft. Not a bad job, can be done on your own drive with sufficient DIY mechanics tools/ability. That's just a few of my thoughts, maybe others have different advice. HTH, Pete __________________ '97MY black 855R M56H + Quaife Porsche/S60R BBK + XP8s, TD04HL-19T, 17"x8J Pegasus, THS intercooler, custom intake & RIP, Samco coolant, Koni/Nivo H&R, S60R manifold, TT-USB, Simota, IPD turbo back, IPD anti-roll bars & droplinks, IPD HT, MSD coil, Innovate LC-1, dimming mirror, Goodridge hoses, DOT5.1, V70 rear lights & handles, poly top bush & A arms & tie bar, strut brace, clear repeaters, 6k HID, catch tank, 2x rear brace

Oct 1st, 2009, 08:30	#3
Flingel VOC Member Last Online: Sep 25th, 2023 14:09 Join Date: Nov 2006 Location: Wakefield (ish)	Had this on the C70 (manual), not long after purchasing. It was done under warranty so I'm a bit vague about what they did. AFAIK they changed the drive shaft bolts for XC70 ones. And glued (?), their word, I presume loctited the shafts/bolts. Been fine for over 18months, 12k miles now. Tel. __________________ VOC Member: 20309 2002 C70 Convertible

Oct 1st, 2009, 23:02	#4
charlotte001 Premier Member Last Online: Jul 26th, 2012 11:13 Join Date: Jul 2009 Location: norwich	drive shafts Are you sure its drive shafts and not an incorrectly adjusted box? As the adjustment from P to D or N to D may not be correct leading to a clunk when you take up drive a good way to tell is stick the car in reverse drive for a few feet see if the clunk is still there if not its an incorrect auto box adjustment The drive shafts will fail completely eventually but when a garage refers to a worn drive shaft what they normally refer to is either The splines that slot into the hub or the gearbox which is a major problem especially if the splines are worn at the box end as the internal mating splines could also be worn leading to a new box or at best serious work on the gearbox. Support bearings on the drive shafts which if they fail could allow the drive shaft to move in any direction destroying the CV joint and or the splines as the shaft moves under the damaged bearings. If its an AWD/4x4 its mostly the internal splines that wear our as all the shafts rotate eventually winding up [common in 4x4s like landrovers] easy cure simply lift the car up and allow the shafts to unwind __________________ Previous Volvos:850 GLT 2.5 20V Auto Saloon Silver. 1997 850 T-5 Auto Estate Nautic Blue Chipped ECU, V70 TCV, Carbon Cased Filter, 17inch alloys, Rattling Engine masking the suspension rattles. Engine doesn't rattle anymore

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