the 660 also has planetaries on the rear wheels. i run mine lots of times in the field at 1800-2000 just to save on fuel as no sense running at 2400 when not needed. if i encounter harder pulling i just giver more throttle. as for the t.a. i dont even know its there, never use it. pull a 5/16 #770 ihc plow in 2nd gear no problem at 2000 rpm. if you think it will be a dog just put the 660 pump on the 560 engine. also the 660 radiator is about 3" taller than the 560.
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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