[MBZ] 300CD Tranny question

[paul]

I recently purchased a '83 300CD for dirt cheap, and drove it from 
Dallas to Austin and back.  I noticed that there's a slight flair from 
1st to 2nd, and sometimes from 2nd to 3rd.  It also takes a second a or 
two to drop into reverse.  What should i inspect/replace first?  B2 piston?

'tanks,
Paul