Hi, I've sent a link about hydraulic oil passages according to throttle lever position to some of yours but i haven't any clues ! So i send to the whole list(s) The page is about '57-59 Torqueflite front valve body; i've take pics and measurements on a spare valve body which show position of kickdown valve vs throttle lever. Also a schema at bottom of the page. I'm not sure of what i assume on this page (ther's some ? in the text ..) so if someone "knows" if i'm right or wrong, let me know before i crawl under the car ... The web page is http://www.ifrance.com/c-i-f/fvb.htm Thanks to all -- Philippe COURANT (Pau, France)- Webmaster des sites ACCF et C-I-F Imperial 1957 Crown convertible Buick 1996 Roadmaster wagon - American Car Club de France (ACCF) : http://www.accf.com - Chrysler Imperial France (C-I-F) : http://www.ifrance.com/c-i-f - Cadillac " Standard of Excellence " : http://www.ifrance.com/accf-cad - SportsCars : http://www.ifrance.com/accf-sprtcar