how are 3500 stall conveters sopasto act

i was drivin it to day and it goes in 1st 2nd 3rd got coures about the looks of the trans fluid its dark like it got hot and broke down and my friend told me that you have to chang the fluid after the first 500miles for the bands because everything is brand new so im thinkin since it looks im takin the trans out any way im gona take the converter out wile the trans is out im gona fix the the vent adjust the bands inspect it take the acomulater spring out im gona realy look at it good never looked at what tci used as far as bands and parts