Juddering when pulling away

2nd January 2013, 09:48

Hi all

When I pull away from a stand still the car judders almost like the cluth is slipping or the wheels are trying to spin. The higher the revs are the worst the juddering is. All engine mounts are fine and clutch was changed back in the summer. The gear box was also changed about 1month ago, Could this be anything to do with it?

Cheers

2nd January 2013, 11:27

Is your battery charging ok?

2nd January 2013, 11:39

The higher the revs the worse it is, but does this juddering go in time with the RPM of the engine OR the rate the wheels are turning at?

2nd January 2013, 12:25

The juddering stops as soon as I come off the biting point on the clutch

2nd January 2013, 13:02

knackered/contaminated clutch friction material most likely. Had an engine/gearbox leak at all? Could be a broken finger on the pressure plate but contaminated friction surface is where i'd be looking first.

2nd January 2013, 13:06

Quote:

Originally Posted by Ross

knackered/contaminated clutch friction material most likely. Had an engine/gearbox leak at all? Could be a broken finger on the pressure plate but contaminated friction surface is where i'd be looking first.

Thanks mate, I have changed the gearbox last month and I do seem to have oil around the bottom of the gearbox, Any idea how I would fix this or do I need to take it all apart.

Cheers

2nd January 2013, 13:16

Quote:

Originally Posted by mattfinch

Thanks mate, I have changed the gearbox last month and I do seem to have oil around the bottom of the gearbox, Any idea how I would fix this or do I need to take it all apart.

Cheers

If there's oil around there, remove the cover protecting the bottom of the flywheel and see if you can look in and spot any oil. If you or a mate have a borescope that's ideal for this.

If there's any signs of oil on the flywheel there's your likely culprit, and if that's the case, it'll be a gearbox off job I'm afraid as you'll need a new friction plate (and a good clean of the cover if it's ok).

2nd January 2013, 13:19

Quote:

Originally Posted by Ross

If there's oil around there, remove the cover protecting the bottom of the flywheel and see if you can look in and spot any oil. If you or a mate have a borescope that's ideal for this.

If there's any signs of oil on the flywheel there's your likely culprit, and if that's the case, it'll be a gearbox off job I'm afraid as you'll need a new friction plate (and a good clean of the cover if it's ok).

Ok thanks for that , Ill have a look later and see what I can see.

2nd January 2013, 13:21

Also if this is the case, if I carry on driving around like this will it damage anything or just stay the same till I sort it out?

2nd January 2013, 13:29

It may get worse (or ironically better) if you continue to drive it. If it's contamination it may just be on the surface of the clutch and will burn off with use (presuming whatever caused the contamination in the first place is fixed). If it's a physical issue with the clutch (ie, a finger on the cover) it will get worse and possibly end up damaging something else (like the flywheel).

If you give it lots of revs (say, 4-4.5k) and slip the clutch slowly, do you still get the judder?

2nd January 2013, 13:38

Quote:

Originally Posted by Ross

It may get worse (or ironically better) if you continue to drive it. If it's contamination it may just be on the surface of the clutch and will burn off with use (presuming whatever caused the contamination in the first place is fixed). If it's a physical issue with the clutch (ie, a finger on the cover) it will get worse and possibly end up damaging something else (like the flywheel).

If you give it lots of revs (say, 4-4.5k) and slip the clutch slowly, do you still get the judder?

It was fine until we changed the box so Im hoping something got spilled and will go away after time. And im not sure about reving high I have not tried that yet. I will give it ago when I finish work. Im guessing the juddering will be a lot worse at high revs

2nd January 2013, 13:42

if you have the nerve/balls/stupidity, you can try deliberately slipping the clutch a lot (like 30 seconds or so) - revs high, handbrake on, etc. Might burn off the contaminant if it's not too badly ingrained. But that's your call

2nd January 2013, 14:09

haha I may give it ago if Im feeling good. I let you know if i brake it

3rd January 2013, 09:04

Quick update. I pulled away a few times in second reving it at about 3-4ooo revs. Car now seem to pull away a lot better now. Just have to wait and see if it comes back lol

3rd January 2013, 09:13

well that's something

Looks like it is a contaminated friction surface then. Hopefully whatever contaminated it has stopped and it's cured

3rd January 2013, 12:19

I hope so mate, When we took the old gearbox off it had craped it self everywhere lol so probbs just some of the oil got on the clutch and now just needs burning off lol.

Thanks for your help though

11th January 2013, 09:57

Just me again, I think I need to take this to the garage at the weekend because this has got worse, Really badly judders when pulling away in first so much that I have to pull away in 2nd everywhere, When it does judder pulling away in first if i rip the clutch up quick it stops juddering and goes fine, do you think this could still be oil on the clutch, as it only does this in first.

11th January 2013, 10:13

You haven't overfilled the gearbox with oil have you?

When you take the gearbox off, change the input shaft seal as well. this is what I think could have happened when the gearbox was refitted?

Sounds like you've definitely got a clutch problem, if it was the gearbox itself I would imagine it would be very very crunchy.

Either way, the gearbox has to come off

11th January 2013, 10:36

Quote:

Originally Posted by MartinObviously

You haven't overfilled the gearbox with oil have you?

When you take the gearbox off, change the input shaft seal as well. this is what I think could have happened when the gearbox was refitted?

Sounds like you've definitely got a clutch problem, if it was the gearbox itself I would imagine it would be very very crunchy.

Either way, the gearbox has to come off

Thanks mate, The gear box is fine no crunching or noise. We did not change any seals when changing the box, Also after fitting the box we filled the box up with 2 litres of gearbox fluid in through the breather hole at the top of the box

11th January 2013, 10:40

Also why would it only do this in first and no other gears?

11th January 2013, 10:56

Quote:

Originally Posted by mattfinch

Also why would it only do this in first and no other gears?

first gear has the least load on it, so slipping is more apparent.

clutch has much more force on it when pulling away in second gear.

If you give it some revs, and lift the clutch very very slowly in second gear you should feel the vibration.

Normal clutch should be perfectly smooth.

11th January 2013, 11:36

That makes sense, Thanks mate I will take it back to the place that done my clutch about 6months ago and get them to look at it, I just hope it does not damage anything between now and the weekend as I need to drive it.

11th January 2013, 11:40

Nah it shouldn't damage anything, just feels like it is