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
did you perhaps replace harness or install a shift kit (aftermarket firmness kit)?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.