I find it handy to throw a thin board of piece of plywood down on the bottom of the chassis, so that as you're guiding the trans under the X in the chassis, you can set the transaxle down on that board and take a rest or slide the trans across the board and up tight to the engine without scraping the chassis up. Once you have the trans bolted up tight to the the engine, you can lift the rear of the trans up into position and slide the board out the back.