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Now, John (MO), there WAS a design issue with the allis D14 transmission. It appears to be a stacking or an accumulation of tolerances that created a poor gear mesh engagement. Of course, it made it really bad when the operator tried to power shift the gears like you do with a car and GROUND the gears badly enough to allow it to pop out under load. THe D14 did not have a synchronous gear transmission, therefore, the problem of grinding gears could create problems as the tractor got older. Im sure you would agree that even allis didnt design their tractors to be operated improperly (grinding gears). I will add that my dad's D14 that I drove ALOT, never ever popped out of gear. I wonder if maybe it was because dad would clobber me if I didnt shift it exactly like he told me to... Here was Dad's directions for shifting his D14:
1. Always let the tractor come to a complete stop before shifting gears (no exceptions), 2. then always count aloud, one, two three THEN engage the shifter into gear. Gee, I guess 40 years of GOOD tractor operating practices overcame the weak design characteristics of the D14 transmission gears. seriously, tho. The d14 was a very good row crop tractor, but the owner needed lessons to NOT grind those gears. But on the other hand, it didnt matter if the owner liked to tear apart or pay for transmissions either. I guess. My advice to the fella thinking about that D15 is this:
If the tranny is good when you buy it, then take care of it and you'll be very happy with it,
However, if the tranny pops out of any gear, you might want to keep looking for something else, unless you decide that problem is ok with you. dwight
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