like croscut said on the other forum i think someone tried to make do as ive never seen a tapered bearing in the rearend of a worm drive, should have a big wide ball bearing back there as it can handle thrust in both directions (forward and reverse gear)
pic of said bearing
pic of said bearing and rear half of worm
can kinda see it in the lower right
going back together you can see how everything is supposed to sit
one more because i can