anyone out there ever change a trans pump on a 4L60E? just put a used tranny in my 98 4wd and it didn't work. put the converter on my old tranny and fluid pumped out. put the new converter on the old tranny and fluid pumped out. put the converters on the used tranny and no fluid pumped out. i guess I should have checked that first, oh well, live and learn. any one?

thanks,
john