I had bad wobble on my 1950 H. The looseness was between the worm gear and circle gear. Took it all apart, rotated the circle gear, the bushings were OK, etc. Tried everything, nothing worked. I noticed the middle teeth of the worm gear were thinner than the outer teeth. I ground off 1/4" of the rear of the worm gear, and built a 1/4" spacer that fit between the bearing and the front of the worm gear. This pushed the worm gear 1/4" aft, and brought thicker teeth into play. I also noticed that the bottom oil seal was actually missing, so I installed one; that probably was why I had so much wear; no lube. Installed oil seals. Whipped up 50/50 mix of wheel bearing grease and 90 wt. trany oil, and poured that in. Fixed it. Drives on the highway with no slop, steers like a car, just a slight correction every now and then. I actually have forgotten about it. HOWEVER, I worry that the grinding will cause fatigue cracking of the worm gear shaft. If you do this, do it at your own risk. But it fixed mine.
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