Clutch judder after a run

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73sprint · #1 Post by **73sprint** » Mon Jul 20, 2015 7:32 pm

Hi all. Any thoughts as to why my sprint suffers from clutch judder only when fully warmed up after a run, say 30 mins or so. The gearbox mount is fairly new and the engine mounts seem ok. No obvious oil leaks around the bell housing,its fine when cold but its a nightmare in first and reverse after a while.

trackerjack · #2 Post by **trackerjack** » Mon Jul 20, 2015 10:55 pm

First thoughts were oil on clutch face but it could be the centre bearing on prop shaft.
Jonners will most likely be the man on this one.

Flyfisherman · #3 Post by **Flyfisherman** » Tue Jul 21, 2015 8:49 am

73sprint wrote:Hi all. Any thoughts as to why my sprint suffers from clutch judder only when fully warmed up after a run, say 30 mins or so. The gearbox mount is fairly new and the engine mounts seem ok. No obvious oil leaks around the bell housing,its fine when cold but its a nightmare in first and reverse after a while.

i had the same issue after a run - renewed the clutch problem gone - all down to a slight buckling with a strip of metal situated between the two friction plates.

viewtopic.php?f=4&t=27610#p268718 - bigger picture here.

Paul

lazeruspete · #4 Post by **lazeruspete** » Tue Jul 21, 2015 9:55 am

i thought all clutches were like that?

Jon Tilson · #5 Post by **Jon Tilson** » Tue Jul 21, 2015 10:24 am

Numerous things can cause this so eliminate the cheapies first....

Engine steady bar rubbers.
Rear axle tie bar rubbers
Prop shaft centre bearing

Engine and box mounts...but you've done those...is the box mount tight?

Only then change the clutch....

Jonners

73sprint · #6 Post by **73sprint** » Wed Jul 22, 2015 7:53 am

Thanks for the feed back. Gonna have a look at the prop this week as i have a spare, cant think it can be much else, well i hope so any way.

#7 Post by **sprint95m** » Wed Jul 22, 2015 10:30 am

Sorry to bring bad news....

73sprint wrote:Any thoughts as to why my sprint suffers from clutch judder only when fully warmed up after a run, say 30 mins or so.

The warmed up bit is the clue.....
I have twice seen this and it was the clutch itself that was at fault.

This is an original Borg & Beck clutch plate that lost its springs and had the centre rivets shear.
The spigot bearing (Oilite brass type) had broken up, possibly because it had been fitted dry?
It was only juddering a little beforehand.

In my experience the other faults suggested display their symptoms all the time, not just when warmed up.
If it was up to me, I'd remove the gearbox......

Ian.

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Clutch judder after a run

Clutch judder after a run

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Hmmm.......