Charlie pretty much covered it. It is an underdrive unit. Direct drive is lever ahead as would give same gear ratios you have with out a TA. DD is driven through a 7 inch dry clutch very similar to any dry clutch and low range TA is a reduction through a planetery gear set. It utilizes a one way clutch mounted at rear of planet carrier commonly know as the ramp and roller that keeps carrier from rotating backwards. When the one way clutch fails it allows the carrier to rotate backwards, input going forward and output shaft stand still there fore tractor does not move. What usually happens is the rollers in the one way form a groove in ramp and therefore they cannot move out to lock (wedge) onto the carrier. Heavy oils in rear end also cause these rollers to stick much more so than lighter hy-transmission lubes. The tractor will free wheel when pulling ta lever back and like said is not a good thing to do at high rate of speed. Normal usage with free wheeling for a few feet at lower gears does no harm. Being a mechanic, of course we like to throw all the blame one can onto an operator if something fails, but truth is, they are basically wear items and they fail with use. That is what is on the tractor for though so use it and don't abuse it at they are fine. TLC goes farther than anything else on any piece of equipment. I have seen owners change fluids etc religiously and beat the heck out of their machines and have all kinds of breakdowns, and vise versa, seen operators rarely change fluids but handle everthing with kid gloves and they last forever. There is always a balance point.
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Today's Featured Article - The Day Tractor Lovers Dream About - by Angus Crawford. The day started at five o'clock on the morning of Friday, the January 29, 1999. My father, my sister, my uncle, my cousin and myself all climbed into my uncle's Toyota van. It was six thirty in the morning and we had a long day ahead. We traveled for six and a half hours to our destination - a little country town with a population of no more then one hundred and fifty people (57 of them being children under the age of thirteen). We arrived hoping to meet up with a man we knew had over one
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