Should I replace my MT fill/drain gaskets?

So, I got a few bottles of redline today and wanted to drain my MT(r155) and my t-case... should I replace the gaskets while I'm at it? I really don't feel like going to a Toyota dealer for a small gasket. It's got about 80k miles on it, and the trans is starting to clunk.

 

I would, piece of mind and they are cheap. You will probably be ok if you don't but if you do get a leak at the plug then the gasket was cheaper then the Fluid you will loose while it leaked and when you have to change it.

 

i'll check out the shape of the fill plug gasket tomorrow and make up my mind depending what kind of shape it is in.

 

When I did the gear oil my truck last week, I planned on replacing both plugs and gaskets, but ended up not doing it because they were still in good shape. I just cleaned em and they they were fine.

 

Yeah, unless they look cracked/smashed up I don't think I'll be replacing them

 

I haven't changed mine and replaced the fluid about four times, just flip the gaskets around and you'll be fine.