Kodak recommends that if you wish to push 400TX (Tri-X) you use HC-110. Look at their website for this film for instructions. Rodinal will produce less than optimal results such as an increase in grain and excessive loss of shadow detail. Bur then Kodak doesn't know anything about their films but some twit on APUG does. I assume you got your information from APUG. They are the twit I was referring to not the OP of this thread.
Check the following site for information on HC-110 and 400TX, http://www.covingtoninnovations.com/hc110/