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NC IA | All had TAs, unless someone has eliminated it. The 37s and 67s had the 3 speed with high-low range, and the 33-35-63-65 had 4-speed. The 37 & 67 had odd-ball ratio ring & pinions, that what makes them slower in high gear. Also VERY expensive if not impossible to find a ring & pinion for a 37/67. Smaller ones had same ring & pinion as all the common 1486 & smaller 2wds. None had planetary rear-ends, all had bull gear rears like 1086's. In fact I think they all used 3-1/4 inch axles like 9xx's, which to this day baffels me. | |
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IH 6588 vs 6788 2+2
