The really first big upgrade of the AF final drives happened with the 21XX series, when they became very strong.
Earlier, they did small upgrades, but did not reall get it fixed untill the much heavier drives on the 21 series. Putting 21 series final drives on a 14 or 16 series combine is a popular upgrade if you can find them.
The drive cases were strengthened several times with added ribbing, plus the sheetmetal case covers were replaced with much more rigid cast iron covers which helped the case spreading problem and extended wheel bearing life. The shaft breakage problem was pretty well eliminated with the stronger "smooth back" axle shafts.
One tip, ANY axle seal leakage means a 99% chance that the outer wheel bearing is failing and needs to be fixed RIGHT NOW. Continuing on can turn a $300 bearing replacement into a $2500 destroyed final drive disaster.
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a Company you can trust and have generous return policies! Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.