srnity: the full extent of your repair cant really be told till the tranny is out and the failed seal is pulled.  if the shaft is bad(excessive wear at the seal surface) then the price of poker just went up.

as far as the seal....if they use a quality seal...not just the' best buy' brand...and its installed properly...then there should be no problem.

you should wonder of course...what caused the seal failure to begin with. if thats not addressed...you could be out another 400.00.

just my 2 cents :o)