In this video viewers will follow the evolution of the John Deere Sound-Gard 4wd tractor design seeing each large horse power row crop model produced from 1975-1996 working in the field. The video shows a selection Sound-Gard 4wd tractors from the 30, 40, 50, 60 and 70. These 4wd gained horse power, design changes with headlight and muffler upgrades over a 21 year period. Watch for the John Deere 8630, 8440, 8650, 8960 and 8770. See if you can spot a John Deere 8020, WA-14, 7520, 8640 and 8850 4wds in the video.
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