Clunk when changing gear?

Post 808908 by Bigsi15 on 2017-01-20 15:05:12

Afternoon This has been bugging me for a while. When I shift (manual) and the gears re-engage I get a click/clunk noise. Engine mounts I hear you say, but they are all new as engine was replaced, other than the gearbox torque one which looks ok if removed. A polybush in the top mount made no change to the noise. It has the same sort of noise as if I lift the front wheels off the ground and rotate 1 wheel quickly forward and backwards with the click from the gearbox. Other than that suspension/wishbones are fine, no knock on turning tight etc Would it really be just that mount or could I be the driveshaft/cv or gearbox? I was under the impression the m56 were pretty tough. Gearbox oil is also new volvo and to the overflow top hole. Might try removing that mount to see if it helps as a start... Hope your all well Thanks!

Post 808910 by MoleT-5R on 2017-01-20 16:57:18

[QUOTE=Bigsi15;808908]Afternoon This has been bugging me for a while. When I shift (manual) and the gears re-engage I get a click/clunk noise. Engine mounts I hear you say, but they are all new as engine was replaced, other than the gearbox torque one which looks ok if removed. A polybush in the top mount made no change to the noise. It has the same sort of noise as if I lift the front wheels off the ground and rotate 1 wheel quickly forward and backwards with the click from the gearbox. Other than that suspension/wishbones are fine, no knock on turning tight etc Would it really be just that mount or could I be the driveshaft/cv or gearbox? I was under the impression the m56 were pretty tough. Gearbox oil is also new volvo and to the overflow top hole. Might try removing that mount to see if it helps as a start... Hope your all well Thanks![/QUOTE] I'd re-check all the bolts are tightened fully on the top mount/engine stabiliser, as might came lose and was clunking on gear change due to lose bolts allowing the steady to slip back and forth.

Post 808912 by Bigsi15 on 2017-01-20 18:28:20

Thanks mole, yeah they are tight, tbh it did it before I changed the engine and mounts too. Isn't getting worse but pretty consistent. Do the boxes wear inside that could produce this?? Shifts lovely and never jumps out of gear

Post 808914 by Bigsi15 on 2017-01-20 19:12:13

Best way I can describe it is a kind of hollowish clack noise rather than a dull thump or knock

Post 808915 by Blackdog on 2017-01-20 19:13:28

Our 97 V70 clunks on gear change and on/off throttle. On ours it's the offside CV joint.

Post 808921 by LeeT5 on 2017-01-20 20:16:21

[QUOTE=Bigsi15;808914]Best way I can describe it is a kind of hollowish clack noise rather than a dull thump or knock[/QUOTE] Pop the wheel hub caps off and check the 13mm hub bolt is torqued to 50Nm. My guess is, one of them is loose.

Post 808922 by MoleT-5R on 2017-01-20 20:21:25

[QUOTE=Bigsi15;808914]Best way I can describe it is a kind of hollowish clack noise rather than a dull thump or knock[/QUOTE] Are if that's the case, then I'd look at the cv joints and driveshaft retaining nuts/bolts as mentioned in the previous posts

Post 808925 by LeeT5 on 2017-01-20 20:30:17

[QUOTE=MoleT-5R;808922]Are if that's the case, then I'd look at the cv joints and driveshaft retaining nuts/bolts as mentioned in the previous posts[/QUOTE] Beat ya! :haha:

Post 808927 by Bigsi15 on 2017-01-20 20:57:32

Thanks guys, the main driveshaft nuts are definitely tight (had them out after one serious heave!) when I changed my engine. Cv joint is definitely possible, sometimes the position of the wheels (left right etc) changes the likelihood of the noise with straight being worst. are there any other signs of a cv issue other than clunking at full lock?? Blackdog mine sounds similar to yours I must say Is there always a bit of play when the wheels are off the ground and rotates with some clicking?? Would be very relieved if it's just a cv joint wearing than a gearbox (as that was a bitch to get out!)

Post 808938 by LeeT5 on 2017-01-21 08:54:07

If you're getting a clicking when rotating wheels off the ground, then it sounds to me like you CV joint is starting to collapse. Maybe the bearing race cage is breaking up? Being as the wear rate is normal equal on CV's, you may aswell replace both, rather than trying to establish which side is causing the noise. You'll probably find one side is worse than the other, yet both are worn and catastrophic failure is looming! The CV outer's cost about £60 each. Don't buy cheap though!! Get OE spec. Hopefully, no damage will have been done to the inner bearings on the shaft.

Post 808941 by Bigsi15 on 2017-01-21 10:20:01

The clicking is coming from the box itself by sounds of things but could also be the joints yes I guess. Easy enough job?? If the inner bearings are worn is that a new drive shaft job then? Thanks guys

Post 808942 by LeeT5 on 2017-01-21 10:24:39

Dont forget, noise travels. If inners are worn it will need new shafts.

Post 808952 by Bigsi15 on 2017-01-21 19:16:49

Ah poo let's hope not that then! I forgot to mention it does it sometimes even at rest. If out of gear and idling If you let the clutch up it clicks most but not all the time. Clutch and all bearing are new 850r from volvo. Flywheel single mass and skimmed. It did this before the engine clutch change which makes me nervous of it being the box.

Post 808956 by MoleT-5R on 2017-01-21 20:10:05

[QUOTE=Bigsi15;808952]Ah poo let's hope not that then! I forgot to mention it does it sometimes even at rest. If out of gear and idling If you let the clutch up it clicks most but not all the time. Clutch and all bearing are new 850r from volvo. Flywheel single mass and skimmed. It did this before the engine clutch change which makes me nervous of it being the box.[/QUOTE] and it unfolds......lol feel your pains a transmission change is a big task but narrow everything down first, so hopefully it doesn't come to that

Post 808959 by Bigsi15 on 2017-01-21 21:36:59

Yeah I hope not... would be a shame to have to change it. It's working fine at the mo it seems so I may just get a louder exhaust or something and drown it out lol! Ignorance is bliss and all that...

Post 808978 by Bigsi15 on 2017-01-23 08:31:30

Would these be suitable?? Seems a good price and may be easier than trying to isolate which if any of the joints are bad http://m.buycarparts.co.uk/volvo/850-estate-lw/7985/10162/drive-shaft?brand%5B0%5D=50

Post 809006 by LeeT5 on 2017-01-23 21:15:54

[QUOTE=Bigsi15;808978]Would these be suitable?? Seems a good price and may be easier than trying to isolate which if any of the joints are bad http://m.buycarparts.co.uk/volvo/850-estate-lw/7985/10162/drive-shaft?brand%5B0%5D=50[/QUOTE] You get what you pay for mate. Tread very carefully as they could be really rubbish and use cheap bearings, gaiters etc. Genuine items are over three times the price, but then they last 100k. I doubt those will :eek:

Post 809008 by Bigsi15 on 2017-01-23 22:08:48

Hmm yes I have heard some horror stories about aftermarket drive shafts. SKF make reasonable bearings at least. I haven't spoken to Volvo yet about how much CV joints are but on parts for Volvo they are about £75 for the outer end, seeing as there are 2CV joints on each axle it is almost as cost-effective to just replace the lot. I'll see how much volvo want for the CV joints and go from there as I don't know how good pfs ones ate. It's a pain really having to replace both on each axle as if I don't and the click remains I won't know if it's still the drive shaft or something else like the gearbox :( can't really afford to spend too much money though to be honest at the moment

Post 809019 by Tim Williams on 2017-01-24 08:51:14

I don't think the FFS ones will last very long with a modified car. Volvo only do exchange shafts not joints, about £300 each.I would buy the SKF ones as their quality should be as good as the original GKN one.

Post 809021 by Bigsi15 on 2017-01-24 09:26:48

Thanks tim, they seem a good price at least! Have you any experience with m56 boxes making clacking clunking noises or would you also be going drive shafts/cv??

Post 809032 by Tim Williams on 2017-01-24 17:28:51

[QUOTE=Bigsi15;809021]Thanks tim, they seem a good price at least! Have you any experience with m56 boxes making clacking clunking noises or would you also be going drive shafts/cv??[/QUOTE] Yes, the planet gears can weak badly making it very sloppy and clunk. You really need to check what's the cause of the noise rather than just throwing parts at it.

Post 809050 by Bigsi15 on 2017-01-25 10:46:41

Completely agree, how would I test something like that though?? Is it a sound that can be isolated to just the box if you go under the car and listen from there for example?? I'm also assuming if it is that they can't be repaired, is it likely to cause a major failure or just make a lot of noise for a long time? Thanks buddy

Post 809074 by Tim Williams on 2017-01-26 07:42:23

[QUOTE=Bigsi15;809050]Completely agree, how would I test something like that though?? Is it a sound that can be isolated to just the box if you go under the car and listen from there for example?? I'm also assuming if it is that they can't be repaired, is it likely to cause a major failure or just make a lot of noise for a long time? Thanks buddy[/QUOTE] Without stripping the box it's very hard to differentiate between wear on any specific part of it or the clutch disc springs. With the car in gear if you hold the N/S inner CV joint and the O/S shaft and check for play between them. The CV joints are the most common.

Post 809080 by Bigsi15 on 2017-01-26 08:29:50

Okay great thanks Tim I'll give it a go in the next few days and see if I can feel any play

Post 809106 by Bigsi15 on 2017-01-26 16:14:17

[video=youtube_share;hQdMPEmmBCA]https://youtu.be/hQdMPEmmBCA[/video] Ok so here's the noise from under the car which sounds like the gearbox, makes this noise when quickly changing direction of the wheel when off the ground. I'm guessing some of this is normal but it's very similar to the noise I get when changing gear. Tim I did the driveshaft thing you said and the longer shaft has some play if you hold the long metal parts either side of the inner cv joint (can rotate them against each other in opposite directions slightly) other side has slight click but can't feel any play Thanks