yes its an E4OD and this is the second since i've had it. it shifted bad when i got it and then a year later finally burned up. i've spent around $2400 on this thing and i know he rebuilds them good because he employs me i and see him rebuild others all the time. well i didn't know for one that there was the cooler in the radiator still hooked up because the lines went all over the place and looped back a couple times. i put a brand new cooler in it(30,000# rating) and it really helped when i disconnected my rad cooler and just had that but i think the damage was already done. it didn't slip after that though and ran fine for about two weeks.
this will be the second rebuild for me. we've been having problems like many of you have probably noticed. second TC, a couple solenoid packs, computer. warranty is going to cover it because and i quote, "burn it up and i'll fix it" what my tranny guy said to it when we were having lots of problems. and i didn't modify that at all and definitely haven't forgot it.
i would love to have one from BTS but they are so expensive!