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When i drained mine the other day, i went right over the top of the driveshaft (straight on) with no problems.
Yeah...I'm with Bevis
I installed my IH plug when my truck was still stock. Went over the top of the driveshaft. There is a "T" on the end of the upgraded plug. Insert one end in first then rotate it down to the side and the entire assembly will be in. Then it's just a matter of screwing the plug in.