ok guys, as many know i have a later model muncie with the th400 output. so i want to put a new tailshaft seal in it before i install it. so my question is what vehicle do i tell the autoparts store to get the right part lol. I have how you just cant tell them the transmission and they get what you need. Also are there any other seals i should replace? i know i can just seal the side inspection plate with a sealant such as permatex ultracopper. anyways let me know if you have any info. Thanks in advance guys