Hey all, I know ive seen other posts on here and other sites as well, with people having trans shift problems after installing a downloader, such as my BullyDog GT. On some of the other posts, people were saying they shifted too firm, some said too soft, etc..Well, heres my problem...I have a 2004 F350 6.0 with the Troqshift autonmatic trans and 4x4, when I install the power download, which is shift on the fly, and has 4 power levels including stock, and Im in the performance or extreme levels, my trans, when shifting from 3-4, jerks very hard, shakes the whole truck, sounds as if something jumped off a gear tooth or something, I dont really know how to explain it, but anyway, it jerks harshly, then finally after a couple of tries, it goes into 4th, and then when it goes to 5th, it seems to go up and down, up and down with the rpm's a few times, then finally settles into overdrive. I returned the truck back to stock, and it seems to shift perfectly. Also, around this same time, I noticed my truck has lost power, it seems as if you're pulling a load or somthing when you start to take off at a stop sign or something, and when youre on the interstate and floor it to pass or something, again, it feels like youve got a large load behind it, or maybe how it would feel if it were starved for fuel or something, just holding back and very slow to build rpm's. I mean, in stock power, I know its not going to be super strong feeling, but it used to take off fairly hard. What all this has me wondering is, could something like the torque convertor have locked up in my trans when I had the programmer on it, causing the problems with the 3-4 shift, and stuck, just never unlocked or something, and now its taking too much power to get it moving with the truck at stock power level, or do the problems sound like theyre probably unrelated?