I have a 2000 wrangler sport tudor with a standard that jumps out of first and third gears. It has a 2,5" lift and thirty three's along w/ a few other mild mods and a stock 4 liter six. The tranny has been rebuilt twice by separate tranny specialists. The second found a worn shift arm which had a factory upgrade several years back. The Jeep is over ten years old and mopar no longer carries parts for this tranny. Any sugestions where I can gets parts or another transmission that will work in this wrangler?