Clunk when lifting the clutch... any ideas?
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Clunk when lifting the clutch... any ideas?
I'm really hoping someone can shed some light on this one...
I have an '82 2L Aircooled.
I've noticed over the last year it's started clunking when I lift the clutch to the bite on a rolling start. If the van is stationary and I lift the clutch, no clunk! But if i'm moving just slightly, when it bites, it clunks loudly. I can't tell precisely where it's coming from but somewhere in the transmission.
It also clunks when I change gear. Just to add I have no issues with changing gear, no grinding or difficulty engaging gears.
I thought (as many would) it would be engine mounts so have changed all these and the gearbox mounts which has actually made the problem worse. I've also had all 4 new cv joints done recently.
If anyone has any thoughts, I'd really appreciate it as I've been scratching my head about this for ages. Ideally don't want to take the whole gearbox apart but if I could narrow it down to at least a certain area!
Thanks
I have an '82 2L Aircooled.
I've noticed over the last year it's started clunking when I lift the clutch to the bite on a rolling start. If the van is stationary and I lift the clutch, no clunk! But if i'm moving just slightly, when it bites, it clunks loudly. I can't tell precisely where it's coming from but somewhere in the transmission.
It also clunks when I change gear. Just to add I have no issues with changing gear, no grinding or difficulty engaging gears.
I thought (as many would) it would be engine mounts so have changed all these and the gearbox mounts which has actually made the problem worse. I've also had all 4 new cv joints done recently.
If anyone has any thoughts, I'd really appreciate it as I've been scratching my head about this for ages. Ideally don't want to take the whole gearbox apart but if I could narrow it down to at least a certain area!
Thanks
- Mocki
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Re: Clunk when lifting the clutch... any ideas?
I would say it must be internal to the gearbox if you have eliminated the engine mounts and the gearbox nose mount and you are sure there is no slack in the driveshaft CVs .
There isnt anything else in the drive train .
Maybe you need to get someone to look under whilst taking up the drive slack to see if anything else is moving ?
There isnt anything else in the drive train .
Maybe you need to get someone to look under whilst taking up the drive slack to see if anything else is moving ?
Steve
tel / txt O7947-137911
________________
1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
tel / txt O7947-137911
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1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
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Re: Clunk when lifting the clutch... any ideas?
Loose hub nut or loose CV bolts?
- tobydog
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Re: Clunk when lifting the clutch... any ideas?
I'd still check the bolts/screws.
Knowledge is power
1970 CU
1970 CU
Re: Clunk when lifting the clutch... any ideas?
Mocki wrote: ↑24 Apr 2024, 17:36 I would say it must be internal to the gearbox if you have eliminated the engine mounts and the gearbox nose mount and you are sure there is no slack in the driveshaft CVs .
There isnt anything else in the drive train .
Maybe you need to get someone to look under whilst taking up the drive slack to see if anything else is moving ?
Thank you, yeah it's a puzzler. It's very noticeable loud clunk and I can hear it coming form back centre so it's somewhere in there. Definitely not CVs as they are new.
I guess it must be a bearing in either the clutch or gearbox as it's when the drive shaft and output shaft are reconnected whilst one is moving when it happens. However mechanically minded I am, gearboxes are a little beyond me sadly. Just don't want to put a new clutch in and realise it's not that either!
Ha, as it only happens when it's moving, it'll be a brave person that agrees to be run over to see if anything is moving underneath!
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Re: Clunk when lifting the clutch... any ideas?
can of beans in a cupboard?
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Re: Clunk when lifting the clutch... any ideas?
Whilst free wheeling during a gear change, the wheels are driving the gearbox. Then when the clutch is re-engaged the engine drives via the gearbox the wheels, so any slack will make a clunk. You could put the van in gear with one wheel lifted off the ground and hand brake off (other wheels securely chocked) and rotate the wheel back and forth. You'll be able to hear where the noise comes from and see what is moving, or not.
Chock the other wheels though, play safely.
Chock the other wheels though, play safely.
1982 Holdsworth poptop. 2L CU Aircooled.
1982 Danbury tintop Caravelle. 2L CU Aircooled.
1982 Danbury tintop Caravelle. 2L CU Aircooled.
- Mocki
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Re: Clunk when lifting the clutch... any ideas?
Ha, that brings to mind an incident from many years ago, when a long term experienced owner had a random knocking noise he couldn’t track down, driving him nuts it was….. well after many people had given advice , non of which led to the solving of the issue , we were on a weekend camp , down at Apps Court in Londinium , a couple of us were trying to solve this issue , riding gently round the field listening and looking , umming and arging … turned out it was a 3/4 full glass bottle of Heinz ketchup rolling about in the bottom of a cupboard . Oh how we laughed !
Steve
tel / txt O7947-137911
________________
1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
tel / txt O7947-137911
________________
1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
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Re: Clunk when lifting the clutch... any ideas?
I had a 106 Rallye about 20 years ago. It had a nasty clunk on the front passenger side, I replaced *everything* - both wishbones, dampers, hubs, passenger side driveshaft, top mounts, even the steering rack! I was a student at the time so it absolutely skinted me. I could never stop this noise.Mocki wrote: ↑25 Apr 2024, 21:43Ha, that brings to mind an incident from many years ago, when a long term experienced owner had a random knocking noise he couldn’t track down, driving him nuts it was….. well after many people had given advice , non of which led to the solving of the issue , we were on a weekend camp , down at Apps Court in Londinium , a couple of us were trying to solve this issue , riding gently round the field listening and looking , umming and arging … turned out it was a 3/4 full glass bottle of Heinz ketchup rolling about in the bottom of a cupboard . Oh how we laughed !
I took the engine out for other reasons, and while stood in the bay, I found a 1/2 drive snapon ratchet with a 36mm socket on it that had slid down the inner wing and was resting behind the headlight.