I replaced auto transmission three weeks ago, because transmission would randomly slip during the 2/3 shift. Now, it seems like I'm low on power. I hadn't driven truck very hard before tranny installation, because I didn't want to get stranded. I have changed fuel filter and cleaned air filter. When I take off from a stop sign, I can push pedal to the floor. If I did that before, I could feel the truck almost losing traction. I'm not getting any smoke out the tailpipe, but I used to get a little bit when accelerating. It starts and idles fine. Fuel pressure at idle is 6500-6900. When accelerating, fuel pressure goes to 22,700 and boost hits 48#. I can hold my hands on fuel line coming off CP3 and it doesn't get hot. I'm not gaining oil on the dipstick. I'm running out of ides.