You really need to tune the TCM, leaving it stock and making lots more power is a recipe for disaster. I havent tuned a blown truck yet, but I imagine you're going to want to raise the line pressures and make sure it doesnt hit the rev limiter before shifting (what it sounds like its doing now).
If the trans isnt fully built (billet input/output shaft, upgraded clutches, shift kit, etc), it will help but its going to need a built trans asap. The 4L70Es the TBSS comes with is worthless in the trucks, they blow up behind bone stock trucks. Add an extra 100hp = very short life span. The trans is the weak spot, 2WD trucks are better off because they can break the rear tires loose with excessive power, AWD trucks (like mine) are pretty much screwed when it comes to this because all the power just keeps it internal to the car. Weak point is the trans, so thats what goes first.
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