Clutch Judder.

splitbusvanatic · Posted: Fri Jul 06, 2012 4:10 pm Post subject: Clutch Judder.

As some of you may know, Ive a t25 Rear End Fitted to my '66 Splittie.
Gear Box, Engine, Trailing Arms,
Shortened driveshafts etc.
also I have a Futbus/Anton Cowell Cable Gear Shifter installed.

Lately on my half mile long test runs,
(Radiator function,Suspension Checks, Going through the gears, etc)
I have developed a really bad juddering on take off.
In all gears except Reverse.

I replaced the gearbox Mount thinking that was it.

Bear in mind I have a four speed 1.6 diesel in this van and I 've converted the box/clutch to be operated by way of a cable, instead of hydraulically.

I'm going to drop the engine and box next week to see if the clutch is contaminated with oil or such, or generally fooked.

Also I have ordered two new engine mounts,
the old ones aren't in great order and I should think, need replacing anyway and could be adding to the problem.

Can anyone think of any other reason for the really bad shuddering,

My Thoughts are:

Cable Conversion on a Hydrauliclly Clutched GearBox causing Clutch to heat up too much and/or Wear too quickly..?

Engine Mounts worn so Much they are allowing the Engine and GearBox to Hop all over the place..?

Clutch is gone or nearly Gone..?

Clutch contaminated with oil leak from engine or Gearbox itself..?

Cable Gearchange not suitablly adjusted..? (i don't think so)

Opinions PLease..
Thanks In Advance..

Kai · Posted: Fri Jul 06, 2012 8:22 pm Post subject:

Clutch Bowden tube,

Length and curvature.

When the engine mounts are under load the engine moves, thus effectively lengthening the clutch Bowden tube and basically disengaging the clutch.

Seen this on a beetle in a 356 conversion.

My 2p's worth.
_________________
Think......

Don't sleep and drive!!!

Kai · Posted: Fri Jul 06, 2012 8:25 pm Post subject:

If it was oil contaminating the clutch I would expect to seal thrown oil dripping out of the bell housing.

Think, kids round about @ the park, spinning fucking fast, your gonna wanna fall out of it. Same thing with oil on a flywheel. there would be signs of oil contamination.
_________________
Think......

Don't sleep and drive!!!

splitbusvanatic · Posted: Fri Jul 06, 2012 9:14 pm Post subject:

Cheers for the speedy reply Kai.
So I might tighten my cable bit first.
Hadn't time the other Evening.

Then when I get my mounts.
That should stiffen things up further.

splitbusvanatic · Posted: Fri Jul 06, 2012 9:40 pm Post subject:

Just did a google search after I replied Kai.
Came up with this.
http://www.vw-resource.com/bowden_tube.html
Some bedtime reading.
This is my first port of call.
Cheers !!!

Kai · Posted: Sat Jul 07, 2012 12:36 am Post subject:

splitbusvanatic · Posted: Sat Jul 07, 2012 8:02 pm Post subject:

HaHa. Nice one.