Click when shifting from second to first...

All,

I did a Google on this and came up with a few comments but I thought I
would put it to the group to get your opinion. I have a 1999 S70 with
an auto trans and just over 120K Kms on the odo. So here are the
symptoms:

Upshifts in all gears: Butter
Downshifts in all gears but second to first: Butter.
Second to first shift: Clunk but not all the time. Oddly there is no
clunk when the tranny is cold. Only once warm.
OBDII codes relating to tranny: None. Confirmed with scanner.
I haven't checked the fluid but it was changed last year.
The upper engine mount is shot and is being replaced this Saturday.

So I'm looking for any ideas and, hopefully, confirmation that this is
not the solenoid issue I read about. Apparently there are owners out
there with the same condition who have had the tranny replaced and the
situation still exists. I'm hoping that the upper engine mount is the
cause as this condition only started in the Fall which is when the
mount started to go.

So any input is appreciated!

Jordan 1999 S70. Clunking!