Maybe you need the flywheel re-surfaced.

On 8-Nov-07, at 11:40 AM, Automatic digest processor wrote:

>
> Date:    Thu, 8 Nov 2007 12:13:44 -0500
> From:    Walter Houle <whoule@ECSCONTROLS.COM>
> Subject: Re: Clutch shutter, vibation, shaking - why?
>
> I have lived with this problem for years and have always wondered why.
> I had a factory rebuilt motor and a new clutch installed by a local
> shop
> and it chattered immediately. It occured in reverse under a light load
> such as backing uphill, or in 1st under heavy load only. The shop
> replaced
> the clutch disk & pressure plate with new parts twice, but the problem
> persisted. I had so many problems with the first shop that I
> finally gave
> up in disgust. Later on, a different shop replaced the slave
> cylinder, but
> there was no improvement. I got fustrated with the whole thing and
> have
> learned to live with it. If I baby the clutch I can avoid the
> chattering
> about 80% of the time.
>
> Walter
> 85 Vanagoon 1.