andylancaster3000
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| posted on 28/8/11 at 08:03 PM |
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Type 9/Clutch Failure?
Hi all,
During the allcomers race at Silverstone drive was lost through a standard type 9 gearbox and we've yet to determine the cause so I'm
going it up for bets on what it is going to be. Prize - pat on back and the satisfaction in knowing you were right!
Symptoms:
Drive was lost in all gears following a down change from 5>4th with no dramas or nasty noises at all. Gear selection still appears to work - i.e.
not stuck in neutral. Clutch, prop, diff and halfshafts all appear to be operational. From what we can see without separating the engine, clutch drive
plate is not slipping. Haven't looked into box yet either.
I've been worried for a while that we are probably now edging towards the limits of the type 9's capabilities with the Duratec. What are
the most common failure modes of the type 9? I was thinking that the clutch drive plate has failed but am surprised it has gone with no noise or spray
of bits of metal from the bell housing.
Anyway, answers on a postcard...
[Edited on 28/8/11 by andylancaster3000]
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Tiger Super Six
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| posted on 28/8/11 at 08:34 PM |
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Could it be anything to do with this?
http://www.locostbuilders.co.uk/forum/9/viewthread.php?tid=159976&page=1
Mark
Tiger Avon
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omega 24 v6
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| posted on 28/8/11 at 08:40 PM |
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sheared splines or flywheel bolts
If it looks wrong it probably is wrong.
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andylancaster3000
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| posted on 28/8/11 at 08:52 PM |
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Mark:
Did wonder when I first saw the thread but we modified a standard t9 bellhousing so unlikely.
Omega:
Could be I suppose but surely some more mess noise and mayhem with both of those?
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austin man
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| posted on 28/8/11 at 09:00 PM |
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what clutch set up ? cable ot hydraulic
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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andylancaster3000
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| posted on 28/8/11 at 09:10 PM |
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From memory (tried a couple!): Duratec housing with sierra/pinto drive plate and concentric hydraulic slave.
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omega 24 v6
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| posted on 28/8/11 at 09:26 PM |
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saw a pinto do it years ago the bolts were held inside by the clutch plate and the flywheel held in place byt the gearboxshaft and the bressurre plate
( but in couldspin on the input shaft.) the spigot bearing is in the end of the crank and kept everything central. It was done by dropping the clutch
at revs in a standing start.
If it looks wrong it probably is wrong.
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britishtrident
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| posted on 29/8/11 at 06:29 AM |
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Not unknown for LUK clutch driven plates to fail at centre, the thin metal plate that joins the boss with the spline to the main part of the driven
plate shears under load , usually when changing gear. This type of failure gives no symptom sother than loss of drive.
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rusty nuts
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| posted on 29/8/11 at 07:48 AM |
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If the engine still starts then it's very unlikely to be the flywheel bolts sheared/undone . Unlikely to be gearbox failure in all gears unless
you have managed to shear a shaft so the most likely suspect is as BT says the clutch center plate. It's not only LUK center plates that get the
middle ripped out of them.
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andylancaster3000
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| posted on 31/8/11 at 12:34 PM |
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Well its seems its not the clutch. Engine is now out and clutch is fully. Therefore the box has failed at either input or output ends. Won't be
able to take the box out for a closer inspection until the weekend.
Any further bets as to what has failed?!
[Edited on 31/8/11 by andylancaster3000]
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MikeRJ
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| posted on 31/8/11 at 03:38 PM |
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Are you sure you haven't sheared a half shaft in the axle? Assuming you are running a live axle.
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andylancaster3000
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| posted on 31/8/11 at 06:05 PM |
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Yup, everything up and down stream of the gearbox appears to be fully operational
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MikeRJ
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| posted on 31/8/11 at 06:23 PM |
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I just found this website:
http://www.type9gearbox.co.uk/
Seems to be a work in progress, but has some useful information. Also has a link to
Bearing Kits which sell Type 9 parts, at
what I thought were surprisingly good prices.
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