[Ratchet looks up at at Optimus then and frowns a little in protest but then... he thinks about what Optimus is really saying and his face relaxes.]

Well.. [He sighs heavily, his joints creaking a little as he does so, shoulders slumping.] Someone has to keep you in check when it comes to your health.

[His face soon turns stern.]

If for some reason you were to be gone... No one would listen to a lousy medic. We would all be in disarray without you, Optimus.