2001 7.3 weird surging with detailed discription

abcits123

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bucking getting more noticeable/more common/worse
==starts immediately.
==cold idle cammy/surgy sometimes. warm idle almost always smooth but sometimes cammy.
==not bucking cold.
==warm weather bucking once needle hits bracketed area.
==cold weather bucking a while after hits bracketed area, def by mid range.
==bucking when overdrive kicks in, also when overdrive selected to off.
==bucking between 45 and 60. 1100-2000 rpm. seems to correlate with lock up on low end (even if OD selected off. lock up in 3rd?) goes away at 60mph and higher.
==doesnt do it in that speed range if foot off throttle or very little throtle/light load, also pushing pedal a little deeper/moderate accelerating thru that speed range will end bucking until you go back to light throttle.
==oil level fine, tps is 6m old and it doesnt do anything weird when goosed in park
== no codes, hutch mod done a few months ago.

any idea's?
 

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