anyone replaced trooper4L30E transmission?

the early 92-95 troopers use the 4L30E transmission, has anyone replaced it or done any maintenance, *other* than replacing transmission filter (done that) and replacing fluid (done that) ?

if you did anything other than the above two items or replaced it, what was it, what did you do and what was the approx cost of the job/task/part?

am hoping I can locate a couple replacement transmissions, perhaps via ITOG or St Charles Isuzu

here's testing info

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did you perhaps replace harness or install a shift kit (aftermarket firmness kit)?

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matt d.
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