If it were me, I'd remove that other front bolt and the transmission mount. Support trans with a 2 x 6 and floor jack on the pan. Then apply some penetrant to the collet fingers and make sure they are moving freely. I had these stick once and they sure held fast. When I finally got the collet to release (having everything else free) it all came out so easily I just had to laugh at myself.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.