So , thanks again to jeepforum.com. Last night and this morning I replaced the rear main seal in my YJ. It went pretty much problem free except for skinning the first seal a little.
Got another one this morning and it went right in. Once again reading some write ups on here and reading threads where some people had problems really gave me a leg up on getting this done.
Took it for a test drive and no leaks !!
Replaced the infamous temp. sending unit as well and now all of my gauges read right except for the gas gauge .. This place rules !