Magh
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| posted on 6/5/19 at 05:21 PM |
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Clutch/ gearbox metallic crunch / grinding
After some help please guys. After a good day at Stoneleigh yesterday had a few issues once I got near home. Car drove faultlessly until I stopped
about 8 miles from home.
I’m running a pinto with 5 speed type 9.
There is a horrendous metallic clunk/crunching coming from what I think is the gearbox/ bell housing area.
So when stationary and out of gear the noise happens in a constant pattern and does seem to increase with engine revs.
If I then put my foot to the floor on the clutch after about half a second the noise stops completely.
I can can select all gears fine and drive with no slip of the clutch. Gears 1-4 continue to make the noise extremely loudly but the strange thing as
soon as I engage 5th it’s all whisper quiet and perfect. The drive to Stoneleigh was 150 miles each way almost all motorway and in 5th the whole way.
Obviously i I realise it’s engine out and maybe box. I’m thinking maybe the release bearing or arm is catching something if it was a bearing in the
box surely 5th would do it too???
Thanks mike.
[Edited on 7/5/19 by Magh]
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ian locostzx9rc2
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| posted on 6/5/19 at 05:56 PM |
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Firstly I thought it sounds like clutch release bearing but if it’s noisy in 1st to 4thand not 5th it Sounds like layshaft bearings in the gearbox
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Magh
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| posted on 6/5/19 at 07:31 PM |
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I was hoping it was the clutch release bearing but fearing it may well not be.
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rusty nuts
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| posted on 6/5/19 at 08:28 PM |
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If the lay shaft bearings were at fault the noise would more likely to disappear in 4th gear not 5th . 4th gear basically means the input shaft and
output shaft , otherwise known as 1st motion and 3rd motion shafts are locked together and rotate at the same speed . Think I would remove the engine
and check the clutch, the clutch fork and the spigot bearing
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ian locostzx9rc2
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| posted on 6/5/19 at 09:20 PM |
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I thought on a type 9 because the 5th gear is an add on on the back of the gearbox that’s why I suggested layshaft bearing
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rusty nuts
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| posted on 7/5/19 at 06:20 AM |
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Did you notice if the noise changed in each gear or is it just engine speed related?
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Magh
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| posted on 7/5/19 at 07:30 AM |
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The noise remains the same but is certainly worse in some gears most especially 4th which seems even more strange as that is the 1-1 gear ratio.
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Angel Acevedo
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| posted on 7/5/19 at 03:37 PM |
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This noise was heard on the gearbox I commented in the "transmission Collision Damage" thread and would be heard at idle, and very faintly
at any other gear...
In my case, I am almost 100% sure it was due to crash damage.
Let´s see what the manufacturer say...
Beware of what you wish.. for it may come true....
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Mash
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| posted on 8/5/19 at 09:30 AM |
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My vote is release bearing. You'll have to take the box out to find out anyway, so hopefully you'l have a relatively easy job.
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