Slight rattle on gear change?

**Signum-Steve** · 18th July 2010, 12:34

I was driving down the motorway today giving it some beans. When I changed gear on about 4500 revs into 5th then put my foot down I get a slight rattle type noise for about one second, then it goes away.
This only happens when I hoof it....push really hard. Otherwise everything is running great. is this an early sign of something on its way out??
Any idea what this could be gents??
Cheers.

**pugs,signum** · 18th July 2010, 13:27

possibly Concentric Slave Cylinder (thrust bearing)
is on its way out and is rattling against the springs of the clutch plate?

**Signum-Steve** · 18th July 2010, 13:46

Hmmm I don't like the sound of that.It sounds expensive.

**pugs,signum** · 18th July 2010, 13:50

gearbox out job im affraid! just had my signum 1.9cdti done with a new dmf, clutch and thrust bearing! thought the dmf was shot as it rattled and saw the parts after and the thrust bearing had gone and was rattling on the clutch springs

but was happy with getting it all done anyways!

**Signum-Steve** · 18th July 2010, 14:00

It doesn't happen under normal driving only when I really go hard. I've only noticed it two or three times in the last year and never really thought much of it. so what do I do? can I just leave it until it increases or get it sorted straight away. Will it damage anything else if its just left alone.
Thanks for your help.

**pugs,signum** · 18th July 2010, 14:07

personally i would leave it and wait till it makes the noise more often!
would suggest you check your gearbox oil is full, if you got a haynes manual they will tell you how to check it and fill it!

the first time mine rattled i was near some road works and it sounded bit like a pneumatic chisel digging until i noticed there were no workers about because it was a sunday

. that was the worst it ever sounded, it was noticedable when giving the car a rev and when the revs dropped back to 1000rpm it was rattle slightly.

**Signum-Steve** · 18th July 2010, 14:32

Yeah that's what I'll do. If it ain't broken don't fix it.... At least I'm on the case, thanks.
At the mo its only a slight noise under heavy load in really high revs. and I don't drive like that as a rule. I think I'll leave well alone until it becomes noticeable in every day driving.

2003 DTI siggy. so far.....
Air box mod
Pipercross filter
Drilled n grooved Discs n pad upgrade
bullet ariel
Opel badged
Painted and decal-ed calipers
egr + boost sensor cleaned..