hmm, only time i can see the input shaft needeing replaced is for the powerglyde. havent read anything or been told before to upgrade the input shaft of a th400. as for the rebuild, ill prolly go manual valve body for the fact id rather have manual, but at this point, the mods i have to go on will start destroying the manual trannies i have, and i cant afford a t56 to stick in there so auto it is.
william