It sure sounds like a dragging clutch. Might be a warped plate.
On Dec 11, 2008, at 5:45 PM, Mark J Bradakis wrote:
> About a year ago I rebuilt a trans and A type overdrive for a fellow
> here
> in Salt Lake City. At that time we also installed one of TRF's 'Magic
> clutch kits' with a Gunst throwout bearing. About a month or so back
> he brings it by the shop and has me drive it around.
>
> The gearbox works well, except that going into second gear you get
> grinding noises. Upshifting or down, you get the noise. Shifting
> into
> any other gear is just fine.
>
> To me the clutch engagement seemed too close to the floor, and the
> transmission behavior was a lot like what my little Nissan pickup
> does on occasion. In the pickup, I pull the floor mat out from under
> the clutch pedal to fix it. I suggested that one probable cause was
> the
> clutch hydraulics, as we did nothing to that last year at the time of
> the rebuild.
>
> Anyway, he brings the car in with a new aftermarket slave cylinder
> and an adjustable pushrod, which I installed the other day. The 1st
> - 2nd
> shifts are smoother, the engagement point is further off the floor,
> but
> still grinding on 3 - 2 downshifts, though not as badly as before.
> More
> bleeding and adjustment, the 3 - 2 noise persists.
>
> Pulled the cover off the gearbox, everything looks good inside. The
> synchro has plenty of clearance, end floats seem to be fine, nothing
> amiss as far as I can tell from my contorted position under the dash
> trying to peer into the heart of the thing.
>
> Now what? Anyone have some sure fire ways to determine if the
> grinding is due to internal gearbox issues, or simply a dragging
> clutch?
>
> mjb.
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