The good ol' 4r100 trany issues

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Last Monday on my way from Idaho to Southern Colorado my truck's tranny went In Denver while accelerating from 55 to 75 there was a very loud vibration sound with moderate vibrations. I pulled over and looked underneath and had a moderate amount of ATF dripping off the rear of the transmission about 2" in front of the transfer case. i was only able to look at the driver side at time due to position off the freeway and could not see right where it was coming from. I had it towed to the boss's in-laws house so i could continue south for my job, But now I need to first know if someone has had the same issue? I know it is a little vague, but its what i have while I'm away. Second Question is anyone know any good tranny shops in or around Denver? Last is if it needs to be replaced any ideas on the right replacement?

Thanks in advance!