auto trans experts

[WADS56]

My aod in my 93lx is shot. When it trys to shift into overdrive the motor will just rev like it is in nuetral. I took it to the shop and they said it needs an overhaul. Labor alone would be around $1000.00 I thought about swaping in a t5 but I have been shifting cars all my life so I want an auto.
My question is how hard would it be to do this myself? I know allot about stangs and I built my drag car from the ground up, but I have never seen the inside of a automatic trans. I would want it to be as cheap as possible and I don't need any high performance parts, this is for a daily driver. Also, is there any special tools needed?

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347 W/ A-trim 6#'s, Canfield heads, out of the box Systemax II intake, solid roller cam. 11.1 @123mph

93lx 5.0 daily driver