new clutch, new problem

[Jesster436 <Jesster436@aol.com>]

I just had a new clutch installed on my 90 90q20v and now that I've had the
car back for a day I've noticed a slight metallic-sounding repetitive
(circular?) grinding sound coming from the rear.  It only happens when the car
is rolling, sometimes it disappears.  Doesn't make the noise when in reverse
(yet).  I don't have time to bring the car back to the shop until Saturday.
Any ideas on this one?  Should I not be driving the car?

TIA,

Jess C. Almero, Jr.
South Pasadena,  CA
'90 90q20V
'86 Coupe GT