Attention: TDR Forum Junkies 
Hey guys. My truck has done this since I got it a year ago. If you get into it a little past half throttle and it starts to pull you hear more than feel a vibration or dull knocking sound. Its almost as if you can hear each cylinder as it fires. It doesn't do it at low rpm's, about 1800 and up. I just changed the carrier bearing for the drive shaft and it didn't make any difference. (Bearing was really bad. Almost enough to lose the rollers. 
) I did notice that it got a little better after the cam plate, which I thought to be odd. I played with the fuel some after that and haven't noticed any difference. Also after I moved the afc and cam plate forward I noticed that when I got on it my boost guage jumps a little, only over 35psi. Peaks at 39psi. Don't know why. Just moved them this weekend so I hope it won't cause any damage.
Thanks for your help.
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