Hello, have never done this, so sorry if in wrong place. Anyway, month ago bought first jeep, 2002 sport, and boy was I happy!! Well, until walked out to find transfer case layn in front yard. After look'n online found was common issue with jeeps and mine didnt seem too bad. So, decided to try my luck at fixing it. i cut out rusted area at bottom of frame, cut new steel, welded in nuts, burnt in the new steel and painted it up. While it was apart I decided to replace auto trans filter and partial fluid. Welp, got all bolted up today and BOY WHAT DID I DO!?!? When I put into reverse in stalls, I guess, before engaging and in drive seems to shift to 3rd before I can get 40 ft outa driveway! Something way outa wack...So, did I mess up something servicing trans or do I have skid plate mounting off that much?? Im old and hope doing this all correctly and thank you very much.