Nice tables showing the components of the US Divisions during WW2: Component (Organic) Elements of U.S. Army Divisions in World War II And the Combat Chronicles: Combat Chronicles of U.S. Army Divisions in World War II
This is an excelent site that will give you all sorts of info on the compostion of an Infantry Division 100th Division And even more information that you wanted to know about a tank battalion 752nd TANK BATTALION in WWII There also good information on division equipmetn on a 36th Infantry Division site, but I lost the linke.