what exactly does cluch slip sound like? every now and again when givin it some juice, when my traction control kicks in i get a loud BUMP BUMP BUMP noise. is this the cluch slippin or just the traction control? :confused:

Nope - clutch slip is easier to diagnose when engine revs rise up, but you get no extra acceleration to reflect it.

oh yeah mate. silly me, used to get that on the works cars. so what is this juddering bumpin noise then?? is it the traction control?

oh yeah mate. silly me, used to get that on the works cars. so what is this juddering bumpin noise then?? is it the traction control?

I think so - I think thats it reducing drive on wheels with less grip. Not sure on how the traction control really works in engineering terms though.

How can you tell what clutch slip is? What are the symptoms?I don't think I've ever gone through it so I'd like to know.

I get loud bangs sometimes when my traction control kicks in...i have come to realise that this is the front wheels bouncing and the traction control cutting power at the same time :thumbdwn:

yes thats a good way to discribe it! it feels and sounds like the front end is bouncin. scared the bagebas out of me the first time it happened, thought somethin was gona fall off. :eek:

Yep, the ASR/TC is rather noisy/violent. Was no where near this bad on my Vauxhall Astra.

It will also do it if the TC is off!

Must not wear lead boots!

what is clutch judder then?

How Do You Tell When Clutch Slip Occurs????

mil, if you put your foot down and revs rise but the car doesn't accelerate like it should. its the same as resting your foot on the cluth and slip it yourself except its doint it itself and you can't stop it

and the banging is definitly wheel bounce, had this in many cars, find it funny myself

what is clutch judder then?

Resonance thro' the transmission (flywheel, driveshafts, etc). Happens especially if the car has been remapped & full acceleration is used @ peak boost. The dual mass flywheel is designed to cancel out this resonance but can only handle a certain amount.

mil' date=' if you put your foot down and revs rise but the car doesn't accelerate like it should. its the same as resting your foot on the cluth and slip it yourself except its doint it itself and you can't stop it

and the banging is definitly wheel bounce, had this in many cars, find it funny myself[/quote']

So THAT's clutch slip!!! AHAAA! Because I remember before having my clutch replaced, the night before I wanted to accelerate from point 0 hard off..so I floored it, released the clutch, but the bloody thing wouldn't skid or move quick enough...

I just read the post I put up 4 posts ago and I can see that the upper case words I had aren't there...who changed it????

the dual mas wheel isn't there for that mate, its there to give a smoother pull to acceleration, i.e. less jerky

so i've been told anyway

Like jon said, boot a re-mapped car from low revs (under 2k) and your'll probably hear/feel it.

I once had clutch slip in the old rover 214, use to but my foot down and the would go anywhere fast at all. You could forget trying to over take

if you suspect the clutch is slipping get up to speed in 3rd and sit at constant revs and speed. floor it and if the revs increase far quicker than you would expect and the speed stays pretty much constant then you have a slipping clutch.

the above banging i get on the same island every morning and is down to the ASR trying to stop the wheels from spinning plus bounce from uneven road surfacing.

thatsthe fellah mil, its a pain when it happens

the dual mas wheel isn't there for that mate' date=' its there to give a smoother pull to acceleration, i.e. less jerky

so i've been told anyway[/quote']

It has a smoother pull due to the damping of resonance!

Have a look at this:-

Double-mass flywheel Some slight irregularities in crankshaft rotation, caused by the ignition pulses, are impossible to avoid, particularly at low idling speeds. The double-mass flywheel prevents these from being transmitted as vibration from the engine to the gearbox and hence to the car's interior.

The double-mass flywheel absorbs the unavoidable residual vibration which the engine's firing pulses would otherwise transmit to the gearbox and driveline. Since 1987, Chevrolet, Ford and GMC diesel powered light duty trucks have been factory equipped with a dual mass design flywheel. Providing vibration dampening action superior to standard clutch disc dampening technology, this type of flywheel typically cannot be resurfaced, it must be replaced.

Why is the Dual Mass Flywheel needed? Transmissions in Chevrolet, Ford and GMC diesel powered light duty trucks have a heightened sensitivity to fluctuating torsional inputs. Result? A strong torsional resonance mode (vibration) that occurs within the normal driving range.

How does a Dual Mass Flywheel provide superior dampening? A Dual Mass Flywheel relocates the damper from the driven disc to the engine flywheel. This dampens engine torsional vibrations more than is possible with standard clutch disc dampening technology. The new resonance point is below the engine operating speed (idle), causing the flywheel to operate briefly at resonance during engine start-up and shut-down.

What are the Benefits of Dual Mass Flywheels? Eliminate excessive transmission gear rattle, making driving comfortable at any speed Reduce shift effort Increase fuel economy Borg-Warner brand Brute Power