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chris k
PostPosted: Sun Jul 01, 2007 6:24 pm 
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848cc
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Location: Inner West Sydney
can anyone help me with what would be causing this problem.

When I shift through the gears 4th to 3rd and 3rd to 2nd I can fill a vibration coming from the front end as i release the clutch.

It only happens on the down shift only

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slinkey inc
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PostPosted: Sun Jul 01, 2007 7:58 pm 
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Throwout bearing wearing out?

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pristic
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PostPosted: Sun Jul 01, 2007 8:00 pm 
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How high are the revs when your down shifting?
I mean are you slowing the car down with the gearbox or brakes? Is it shudder through the pedal or vibration through the steering wheel?
Does it happen every time? Every gear?

Peter.

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CPOCSM
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PostPosted: Sun Jul 01, 2007 8:00 pm 
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Oil on the clutch plate I reckon or lightly contaminated with something...

Hooroo

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chris k
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PostPosted: Sun Jul 01, 2007 8:17 pm 
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im slowing down and it vibrates in the steering as im using the gearbox to help me slow down i dont have a rev gauge so its had to tell but its not high revs

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chris k
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PostPosted: Sun Jul 01, 2007 8:19 pm 
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Location: Inner West Sydney
i also fill it on the pedels mainly the pedels

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chris k
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PostPosted: Sun Jul 01, 2007 8:21 pm 
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it doesnt happen through the gears when im going up in the gears

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willy
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PostPosted: Sun Jul 01, 2007 8:22 pm 
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Definitely sounds like a loose bolt in your rear subframe mount.
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drmini in aust
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PostPosted: Sun Jul 01, 2007 8:25 pm 
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It's probably caused by the 6 drive straps (3 sets of 2) on the flywheel that connect the diaphragm and backplate to it, and keep hose parts concentric with the flywheel.
Under drive load they are all in tension = good. BUT, when you downshift and dump the clutch out they are in compression. Not good for a bit of spring steel about 1mm thick... eventually you can buckle and break them, causing clutch or flywheel damage.

Many racers fit 3 straps in each set instead of 2, making 9 in all- if you do this the 3 ears on the backplate need machining for the extra strap thickness. :wink:

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mr moke
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PostPosted: Sun Jul 01, 2007 10:38 pm 
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check your front wheel nut's aren't loose 8)
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chris k
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PostPosted: Sun Jul 01, 2007 10:55 pm 
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thanks everyone for your replys

i have some cut for me the next few nights until i sort this problem out

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