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Clutch judder

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Mail From: Stuart Greenwood <(email redacted)>

I reconditioned my engine and fitted a new clutch 7500 miles ago. The clutch
has started to judder badly and I have to use more than the normal amount of
revs to get away smoothly in 1st and 2nd gear.
I don't rhink rhat it's due to
oil leaking from either the gearbox or the engine getting on the clutch plate.
The engine mounts don't look too bad... haven't looked at the gearbox mount
yet... all were new 7500 miles ago.
What other causes might there be?
Stuart a Greenwood
71 Mk IV Spitfire, 71Mk 1 Stag
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Mail From: Douglas Braun <(email redacted)>

This is a '71? Did you ever park the car on a steep hill pointing
down, or jack the rear end way up? The transmission does not have a
real oil seal at the front, and if the car is tipped enough, and the
transmission oil can leak out around the input shaft and onto the
clutch.

This happened to me about 8 years ago, and I had the same symptoms you
have. The fix was
to rev up the engine and smoke the clutch a few times. It hasn't
given me a bit of trouble since then.

Doug Braun
'72 Spit

On Tue, May 18, 2010 at 1:58 AM, Stuart Greenwood <(email redacted)>
wrote:
> I reconditioned my engine and fitted a new clutch 7500 miles ago. The
clutch
> has started to judder badly and I have to use more than the normal amount
of
> revs to get away smoothly in 1st and 2nd gear.
> I don't rhink rhat it's due to
> oil leaking from either the gearbox or the engine getting on the clutch
plate.
> The engine mounts don't look too bad... haven't looked at the gearbox mount
> yet... all were new 7500 miles ago.
> What other causes might there be?
> Stuart a Greenwood
> 71 Mk IV Spitfire, 71Mk 1 Stag
> _
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Mail From: Roger Elliott <(email redacted)>

Another place to check is the differential mounts. When we were at the
VTR in CA last October, my wife's TR250 was juddering badly.

We took it to a shop, after a test drive they took it into the shop and
put it on jack stands. Then with the engine running, they applied the
brakes and let out the clutch. (They applied the brakes to provide some
resistance). You could see the differential wind up to one side, then
swing back to the other and repeat the process.

After the differential mounts, were replaced the problem was gone.

Roger

Stuart Greenwood wrote:
> I reconditioned my engine and fitted a new clutch 7500 miles ago. The clutch
> has started to judder badly and I have to use more than the normal amount of
> revs to get away smoothly in 1st and 2nd gear.
> I don't rhink rhat it's due to
> oil leaking from either the gearbox or the engine getting on the clutch plate.
> The engine mounts don't look too bad... haven't looked at the gearbox mount
> yet... all were new 7500 miles ago.
> What other causes might there be?
> Stuart a Greenwood
> 71 Mk IV Spitfire, 71Mk 1 Stag
_______________________________________________

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Mail From: Mark J Bradakis <(email redacted)>

Roger Elliott wrote:
> Another place to check is the differential mounts. When we were at
> the VTR in CA last October, my wife's TR250 was juddering badly.

The Spitfire diff mounts are different than the IRS TR series, and are
not prone to the rocking motion and cracked mounting pins one sees
on the TR4A - 6. But still the front mountings can deteriorate and
cause the diff to flop around a bit, it is a good idea to check them
out.

mjb.
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