I have read many many threads about clutch shatter problems - also the one which has recently discussed in this forum.
The problem is quite similar:
- Take off in 1st gear is nearly impossible - extreme shatter, as if the dash would like to jump out of the car.
- Take off in 2nd gear is possible
- Reverse no problem
Things done:
- resurfaced flywheel installed
- new Centerforce Dual Friction 10.5" 23-spline clutch - all mounted correctly - doublechecked
- Leaf springs were restored with new clamps - to make sure they are not the problem, we have changed to a set of new springs - no difference
- Torque strap on driver side installed
- Pinion angle checked - was 1 degree nose down - adjusted to 5 degree nose down - no difference
- Z-Bar bushings had some side play - with new bushings there´s no play left now
- tested with a range of clutch linkage play settings - no difference
- Clutch pedal Over-Center spring removed
- changed over to a different clutch fork which has a bit of a different angle
- Throwout bearing checked
All these tasks did not lead us to any usable result.
Then we have taken out the trans and changed the clutch back to a standard one (used but nearly no signs of use)
Checked the flywheel again - also with a dial indicator - runs absolutely even.
With the standard clutch, the shatter is not fully gone, but now it is at least possible to take off slowly. With higher rpm or harder launching, the shatter is still present.
I´m running out of ideas and hope that there´s something else left we have overlooked.
Here´s 2 videos which show how the leaf springs act due to the shatter:
And one showing the engine while under load:
It still looks like there´s some engine movement although it is held by a torque strap.
