I have a 2002 S60 Turbo and it seems whenever I first start the car up and start to drive I get a hard shift going from 2nd into 3rd; It does go away after the car has warmed up though. Should I be considered about this? I was planning on doing a tranny flush soon anyway....

 

I would do a tranny flush and take it from there.

 

Should I do the flush ASAP or would it be safe to wait a week or so?

 

A week or so is fine.

 

Flush or lower trans mount