2004r Sluggish in Second

[jcd9730]

Well, I just put a BTO 2004r in my truck, and I'm having a couple problems. I'm going to call BTO sometime this afternoon, but since I dont know much about auto transmissions I thought I'd ask here first.

1st gear is perfectly fine, however steady driving in second really lugs then engine. Say I'm driving at 25mph or so, in second and throttle feels normal, if I let off the gas for just a second and accelerate again its all the sudden really sluggish. Similiar to when you are in too high a gear in a manual trans, and its so bogged down even half throttle barely accelerates. If I floor it it comes back to life, but its not downshifting. Its almost like the TC is locking up? Im not real sure. If I lightly brake and accelerate at the same time I get normal second gear throttle response but when I let the brake off its right back to being sluggish.

I tried in 3rd gear, and the same thing happens. I got a 2200 stall in, and its a basically stock 350. I had a th350 in before, and it did not act like this in second.

I dont have any idea what cam is in it, but its pretty mild. I think some kind of Edelbrock. Could it be overstalled?