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Author Topic: gearbox noisy at idle until clutch pressed in  (Read 6905 times)

August 03, 2010, 05:03:33 pm

LoneWolf

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gearbox noisy at idle until clutch pressed in
« on: August 03, 2010, 05:03:33 pm »
Today i decided to replace my clutch release bearing on the mk2, straight forward enough, changed out the old gear oil and fired her up....... and the horrible knackered bearing sound was still there :-\

 ive looked at a few drawings/ diagrams of the gearbox and cant for the life of me work out whats making this rather annoying noise :(

 Any ideas guys and gals?
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Reply #1August 03, 2010, 05:19:34 pm

theman53

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Re: gearbox noisy at idle until clutch pressed in
« Reply #1 on: August 03, 2010, 05:19:34 pm »
could it be the springs are getting loose in the clutch disc? When I took my old disc out I couldn't believe how close it was to coming undone. Other than that I don't know. Maybe contact brokevw.com
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Reply #2August 03, 2010, 06:13:04 pm

rs899

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Re: gearbox noisy at idle until clutch pressed in
« Reply #2 on: August 03, 2010, 06:13:04 pm »
Yeah, I pulled a good looking clutch out of my car that was about to come apart, too.  It could be the small thrust plate deal that rides in the pressure plate has become loose. Hate to say this but you may want to take it apart for some peace of mind....
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Reply #3August 03, 2010, 10:06:11 pm

Quantum TD

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Re: gearbox noisy at idle until clutch pressed in
« Reply #3 on: August 03, 2010, 10:06:11 pm »
Quote from: theman53 on August 03, 2010, 05:19:34 pm
could it be the springs are getting loose in the clutch disc? When I took my old disc out I couldn't believe how close it was to coming undone. Other than that I don't know. Maybe contact brokevw.com

X2

Sounds like a broken spring.
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Reply #4August 03, 2010, 11:25:38 pm

81 vw pu

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Re: gearbox noisy at idle until clutch pressed in
« Reply #4 on: August 03, 2010, 11:25:38 pm »
Quote
changed out the old gear oil and fired her up....... and the horrible knackered bearing sound was still there

Was there any metal flakes in the old oil you drained? Could also be the input shaft bearings. When you pull it out to check the clutch disc springs, spin the imput shaft with a large drill while in neutral to know for sure if its clutch or trans-axle.
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Reply #5August 03, 2010, 11:43:02 pm

LoneWolf

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Re: gearbox noisy at idle until clutch pressed in
« Reply #5 on: August 03, 2010, 11:43:02 pm »
I didnt see any metal in the old oil, but theres a magnet inside to catch the bits, so there may be some there somewhere.

 i just knew itd be a gearbox off job, i hate doing that  :(
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Reply #6August 04, 2010, 04:49:03 am

rs899

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Re: gearbox noisy at idle until clutch pressed in
« Reply #6 on: August 04, 2010, 04:49:03 am »
What does it sound like?  Does it change with clutch in or out?

I have never heard of a throwout bearing going bad on one of these as they are bathed in oil...but anything is possible...
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'91 Jetta 1.6 NA, '82 Caddy 1.6NA, '81 Cabriolet,  4 Mercedes OM616/617s , 2 Triumphs and a Citroen DS19 in a pear tree.
Reply #7August 04, 2010, 07:00:46 am

81 vw pu

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Re: gearbox noisy at idle until clutch pressed in
« Reply #7 on: August 04, 2010, 07:00:46 am »
Quote
Does it change with clutch in or out?


Read the topic line one more time.
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Reply #8August 04, 2010, 07:48:24 am

rs899

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Re: gearbox noisy at idle until clutch pressed in
« Reply #8 on: August 04, 2010, 07:48:24 am »
Duh-  ooops.  As I wrote that I kept thinking I knew the answer already, but I couldn't find it in the body of the string....sorry.
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'91 Jetta 1.6 NA, '82 Caddy 1.6NA, '81 Cabriolet,  4 Mercedes OM616/617s , 2 Triumphs and a Citroen DS19 in a pear tree.
Reply #9August 04, 2010, 04:33:18 pm

LoneWolf

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Re: gearbox noisy at idle until clutch pressed in
« Reply #9 on: August 04, 2010, 04:33:18 pm »
just a thought, but if the push-rod in the middle of the input shaft was worn, could that be a possible suspect?
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Reply #10August 04, 2010, 07:59:57 pm

rs899

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Re: gearbox noisy at idle until clutch pressed in
« Reply #10 on: August 04, 2010, 07:59:57 pm »
I don't think so....something is shaking in the bellhousing.
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'91 Jetta 1.6 NA, '82 Caddy 1.6NA, '81 Cabriolet,  4 Mercedes OM616/617s , 2 Triumphs and a Citroen DS19 in a pear tree.
Reply #11August 05, 2010, 10:07:34 am

Rabbit on Roids

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Re: gearbox noisy at idle until clutch pressed in
« Reply #11 on: August 05, 2010, 10:07:34 am »
my bet would be that its time to replace some bearings..
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Reply #12August 05, 2010, 04:34:05 pm

LoneWolf

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Re: gearbox noisy at idle until clutch pressed in
« Reply #12 on: August 05, 2010, 04:34:05 pm »
if its going to involve stripping the gearbox and rebuilding it then i think ill start looking for another box, i REALLY dont want to be taking the thing to bits at the side of the road again  :(
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Reply #13August 06, 2010, 02:00:59 pm

Rabbit on Roids

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Re: gearbox noisy at idle until clutch pressed in
« Reply #13 on: August 06, 2010, 02:00:59 pm »
its bolted down tight to the engine right?

if it is, then i would suspect clustergear bearings..
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Reply #14August 06, 2010, 04:26:10 pm

LoneWolf

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Re: gearbox noisy at idle until clutch pressed in
« Reply #14 on: August 06, 2010, 04:26:10 pm »
Are these easy to get at?
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