This is my first post. I am a weekend farmer, who got tired of throwing wrenches at my red tractors, and bought a 4640 a year ago. It is a quad shift with a cab and with one of the late serial numbers in that series, built I think in 1983.
For the first time in years, I have a good stand of corn in my duck hole, but it cost me 1st and 2nd gears on my quad shift. It happened suddenly. The gears lightly grind and it moves a little in first and second in any range. It works fine in third, forth and reverse gears in any range.
My research indicates it is a broken shift collar. I have checked cab mount bushings and adjusted linkage.
A JD mechanic said the top gear would need to be rebuilt and priced the parts only from John Deere at $7,000. I am a broke public servant with kids in college and simply canít afford to fix it. My old IH 1566 needs a $3,000 rear end replacement.
I suspect installing used parts would not last. Would installing an entire used gear housing with gears already in it be better? Would it hurt to run it in third and forth? Any suggestions?