Instead of starting a new thread, I'll just add to this one. Oh masterful Bonneville gurus...I'm looking to add a trans cooler to my 99 (see mods). Does my series II come with an external cooler and/or do I need one? i'm planning on buying the re-programmed PCM next and figured I should get the trans cooler first. (tranny is re-built less than 10k on it.). How difficult is the install and where would I mount it? Oh, being Chicago area, hot summers, cold winters, idle time in rush hour traffic...blah, blah, blah.