The 012 is rubbish with anything of 300 ft/lbs. With gear widths less than 3/8 of an inch they are very light duty (minimum gear width on the 01E is 2nd gear and it is 7/8 of an inch wide with first 3rd, 4th, 5th, and 6th having a tooth width of 26mm-30mm.
The 01E is not available in any scrap yard in North America, and if you find one used plan on spending a tidy sum getting it back into condition, as the vast majority taken out of service are due to bad pinion bearings and they have other issues as well. So one with a diff noise, will set you back about $300.00 in parts (for the bearing) plus at least 3 hours shop time for install.
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