Lot of times the high speed road gear comes up in the IH tractors. If you look at a cross section of the transmission you will readily see how this comes about. The only way to change that road gear seed is to put the drive pinion down on the lower shaft. Being on the top shaft, direct drive is engine speed on pinion. They stayed with this all the way through the 86 series tractors. Then take a look at a A or B or C and you will note the pinion is on lower shaft. All you have to do to change highest gear is to alter the number of teeth on the transmission gear. Me, being an IH mechanic and really the only tractor I feel qualified to intelligently make judgement on, always felt they needed to change that and was disappointed when they made a whole new transmission and final drive with the 706 on up and still stuck to that basic design. Now the 50 series used a three shaft transmission so they could do a whole lot of speed changing in relation to engine speed. Ever notice how a late model 1066 for instance, would not pull any bigger load than an earlier model. It just pulled it faster. Upped the rpm's of engine, same gear ratio's, increased horse power so more work done but no more pull power.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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