trans has been built for a while. i was a dumb *** back a few years ago and had my 700R built to the hilt (ever upgraded part to make it stronger, i spent thousands on it like a dummy),backed with a Vig 3600, trans worked great in my Z28 and when i drove it a little in my 97SS... i just put the 383 in my car backed with this tranny, the only drive time it has on it with this setup is pulling it up the trailor, backing it off the trailor and idleing to the check in and to my spot at autorama. trans never even budged my trans temp gauge and i never even touched the gas, i just let it idle... well i went to go back into my spot on the carpet and all of a sudden the car quit moving. i gave it some gas and it moved ever so slowly. so its slipping. trans isnt terrably low on fluid, like its in the operating range on the stick. the trans acted perfectly normal before i pulled the old motor. nice firm shifts, didnt slip at all ect... im at a total loss on this one... and it acs like this in every gear and reverse...

any thoughts? ideas? am i missing any pertinent data?