Gearbox impending doom? |
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ranton_rambler
Senior Member Joined: 13 Feb 2015 Location: Stafford Status: Offline Points: 1147 |
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Posted: 27 Sep 2015 at 19:22 |
So, I need some advice from the collective…. I dropped the oil out of my 850GT gearbox today – it’s done
about 6000 miles since the last change I think. The oil itself was not
discoloured but when I tipped it into the waste container there were a few
metallic flakes in the bottom of the tub. A couple of these stuck to my magnet,
although they were only about 1mm in size. The gearbox is not noisy and all works as it should, so do I
just keep using it until it develops some symptoms or do I pull it apart? As a
compromise I did wonder about using it for a few weeks and then dropping the
oil again to see what’s in there. Ian |
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italianmotor
Senior Member Joined: 14 May 2014 Location: UK Status: Offline Points: 2101 |
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Change oil, don't worry about it, keep riding, take it apart when it stops working! (I put a bit of Moly in mine, don't know if you're meant to or not.)
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Guzzi lover doing my own thing: http://www.italianmotormagazine.com
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Ingegnere
Senior Member Joined: 14 Jan 2015 Location: Devon Status: Offline Points: 125 |
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Gearboxes will flake metal as there is a huge amount going on in a gearbox compared to engines with gears meshing, swapping, etc, etc. Fit a magnet to the plug which should help and a bit of Molyslip wouldn't hurt but isn't 100% required.
Don't fit it till its broke, gearboxes can take a huge amount of abuse. |
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Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
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I USE MOLY IN THE GEARBOX yes there is often gunge on the magnet ...however it has covered an awful lot of miles
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The Older i Get, The Better I Was
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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This is why the stock filler plug is the type with a magnet insert, I.e. Same style as sump drain plug.
I once had an old style Mini that regularly had sizeable bits of swarf in its oil at every oil change. Was still running when I sold it. |
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"Chicken nuggets don't dance on a Tuesday."
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johnno
Senior Member Joined: 19 Jul 2014 Location: loughborough uk Status: Offline Points: 5582 |
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When I got my sport I changed gearbox oil to find metal flakes like you . I put some molly slip in and so far no problem . I agree with all the above posts . I'm extra careful changing gear nowadays
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1100 sport corsa , Yam R1, guzzi 650tt rider
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johnno
Senior Member Joined: 19 Jul 2014 Location: loughborough uk Status: Offline Points: 5582 |
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Sports are well known for this problem
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1100 sport corsa , Yam R1, guzzi 650tt rider
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Jim Mac
Moderator Group Joined: 14 May 2014 Location: Edinburgh Status: Offline Points: 3202 |
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I used to get some bits on my Cali (66k) on each oild change, but never anything big so i didnt worry about it, fairly normal for a big clunky gearbox i would think
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V85 TT Trzvel BMW R45
Too old to die young |
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ranton_rambler
Senior Member Joined: 13 Feb 2015 Location: Stafford Status: Offline Points: 1147 |
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Thanks all, I'll leave well alone. I didn't put any moly in, but will drain again over winter and put some in then if it seems OK.
Ian
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Don't need to drain just to add the moly. (?)
Added molyslip to mine last couple of changes, was fine with it. Think it makes the gear selectors a bit more slippery too which helps. |
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"Chicken nuggets don't dance on a Tuesday."
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