I used a regular 2 ton MVP floor jack to support the front of the tranny, then used a pine board about 1/2" thick and 3" wide, and I laid it across the hole for the inspection cover with the ends of the board pointing towards the engine and the rear axle. I then used a moving strap with hooks on the end, wrapped it around the output shaft on the tranny, and hooked the hooks together around the piece of wood. I then removed all of the bolts for the tranny, and slid the transmission back, while moving the pine board back. After I disengaged the tranny from the engine, the jack was supporting the front of the tranny, and the strap supporting the back. Then, I strapped another strap to the input of the tranny, and removed the jack. I pulled the jack out, and slid an old peice of carpet under the tranny. then, I slowly pressed the buttons for the friction clamps on the straps, and slowly lowered the tranny onto the carpet. After that was done, I removed the straps and pulled the carpet back, and presto! I had the tranny out, and the carpet soaked up any remaining gear oil. It only took about an hour, and was pretty easy. Those SM420's are heavier than they look.
Now, putting it back in may not be so easy. I need a clever way to put it back in there....
