My transmission needs a rebuild and the estimate is $1000. The question is, should I upgrade it? For wheeling, would I be better off replacing it with something better? Or if I have it rebuilt, are there any mods or upgrades I should have done while they're in there? I considered changing to a manual, which would be my preference, but that's a pretty involved process and there doesn't seem to be any real consensus that it's superior. So, I think I'll probably stick with an automatic. I hate to admit my ignorance, but I don't even know what's in it (and it's at the shop so I can't even look at it right now). It is a 1974 Blazer with the towing package and a crate 350. Thanks for your advice.