how hard is it to do for the first time....i'm fairly knowledgeable and have the tools and patientance...so how how hard are they 2 do myself or should i let a shop do it?....if i do it myself what else should i change or replace when i have the tranny down....and also should i just go for a stock replacement or go with an aftermarket one like a high rev jr.....this will be my daily driver so i don't want the car to be to hard to drive...imput would be appresiated