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Shudder in first gear


 
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Phil the drill luckman
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Joined: 25 Oct 2020
Posts: 7
Location: England

PostPosted: Tue Mar 09, 2021 7:45    Post subject: Shudder in first gear Reply with quote

Hi I have a Land Cruser Colorado with a 1KZTE Engine it’s a manual gearbox. I am experiencing a shudder when setting off in first gear but only when the engine is warm when the engine is cold I don’t feel it ! the clutch has only done about 1000 miles Please could someone give me some advice many thanks Phil
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daihot
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Joined: 21 May 2020
Posts: 5
Location: Pembrokeshire

PostPosted: Thu Mar 11, 2021 1:28    Post subject: Reply with quote

Hi Phil,
First thoughts could be contamination of clutch plate due to leaking rear crankshaft oil seal or first motion shaft gearbox seal.(Should have been fairly obvious when gearbox out)
Difficult to asses with little detail, was previous clutch just worn out or other issues.
Was complete new 3 piece kit fitted or just centre plate?
Regards,Dai.
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Phil the drill luckman
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Joined: 25 Oct 2020
Posts: 7
Location: England

PostPosted: Fri Mar 12, 2021 4:21    Post subject: Reply with quote

Thanks for the reply. I changed clutch plate and pressure plate and thrust bearing. Seal seemed ok   The odd thing is that it is absolutely fine for about the first 15 minutes but then get the shudder only in first gear on takeoff!
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diggerdave
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Joined: 03 Oct 2014
Posts: 448
Location: Bubwith

PostPosted: Fri Mar 12, 2021 19:07    Post subject: Reply with quote

Approaching this sideways, two possibilities might account for the 'only when warm' nature of the fault:

1. It's the clutch but because gearbox oil is more viscous until it gets warm it serves to mask the shudder (seems unlikely that the effect would be big enough);
2. It's not the clutch, but the engine lacks power and causes the judder (in the way that some engines can cut out - or nearly cut out - when setting off from a junction). Not felt when cold because the engine automatically idles higher when cold, masking the effect.

I love a bit of blue sky thinking! But I can't see why a clutch fault would only occur when the engines warm if you've ruled out a leak.
_________________
1997 KZJ90 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 217k hard miles
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Phil the drill luckman
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Joined: 25 Oct 2020
Posts: 7
Location: England

PostPosted: Sun Mar 14, 2021 16:52    Post subject: Reply with quote

I’ve had a go at cleaning the throttlebody and the shudder Seems to have reduced so I’m wondering if I might need new injectors as my car has done 200,000 miles ! And like you said it may be a lack of power
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diggerdave
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Joined: 03 Oct 2014
Posts: 448
Location: Bubwith

PostPosted: Sun Mar 14, 2021 22:52    Post subject: Reply with quote

Not saying it's your problem, but I had a problem where it almost stalled when pulling away. I can't remember what promted me to do it but the problem completely disappeared when I cleaned up the earth point from the battery to the inner wing. It was very corroded
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1997 KZJ90 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 217k hard miles
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Phil the drill luckman
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Joined: 25 Oct 2020
Posts: 7
Location: England

PostPosted: Sun Mar 14, 2021 23:24    Post subject: Reply with quote

Thanks I will give it a try tomorrow 👍
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Phil the drill luckman
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Joined: 25 Oct 2020
Posts: 7
Location: England

PostPosted: Sat Mar 20, 2021 17:34    Post subject: Reply with quote

After watching lots off 1KZTE engines on YouTube I have come to realise that’s on tick over my engine shakes a lot !
I’m wondering if this is the cause off the shoulder when setting off ps this only happens when the engine has warmed up
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Phil the drill luckman
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Joined: 25 Oct 2020
Posts: 7
Location: England

PostPosted: Mon Mar 29, 2021 22:23    Post subject: Reply with quote

In the end I can only assume it is a flywheel problem maybe slightly warped so after talking to a friend who advised me to try slipping  the clutch in third gear whilst setting off I can only assume this puts a bit of a polish on the clutch plate   That stops it grabbing so hard. And I am pleased to say it has drastically reduced the shudder to a point it is hardly noticeable   I don’t know how long this will last but at least I know when I next change the clutch I will buy a new flywheel as well.
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diggerdave
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Joined: 03 Oct 2014
Posts: 448
Location: Bubwith

PostPosted: Tue Mar 30, 2021 10:30    Post subject: Reply with quote

Thanks for the update. Not a problem or a solution that I've heard of before! So I guess you don't notice it when the engine is cold because the raised idle speed turns the flywheel that little bit faster allowing it to balance out the juddering.
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1997 KZJ90 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 217k hard miles
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