[iceminion]

If it is a major change in just one gear, chances are its internal transmission wear, I would rule out shifter cables/bushings beacuse its only in one gear.

Turbos are harder on drivelines, and if your sig is correct, you may have pushed your transmission a bit too far.

I would ask Shep, he may be unfamiliar with your trans, because (I think) its a dodge transmission. he could point you in the right direction however