Grinding when downshifting

[scottb2460@earthlink.net]

Hey gang,

My wife advises me that most of the time when she downshifts into second
gear makes a grinding sound. Since I haven't noticed it and usually
don't downshift into 2nd over 30-35mph, I decided to see what she's
talking about.  I did notice what she was describing.  Didn't do it all
the time, but about sound about 1/3 of the time.  Downshifting into all
other gears was fine and when I aggressively downshift. I did have the
90k service and changed out the gearbox/diff oil to synthetic.  

Anybody have experience with this?  Appreciate any feedback.

Scott