Hi John, It's an interesting prospect to change to an 8-speed box from the 6. I always felt that 6 speeds was not enough particularly when baling for example. As always there are some 'buts'.
My info shows two different 8-speed boxes. One is the 8-speed constant mesh (10 spline PTO plate and the other is the 8-speed constant mesh (25 spline PTO plate). In general in the UK 8-speed boxes were fitted to tractors with the 10/12" clutch. Before committing yourself you will need to ensure that a change of clutch plate/s will be available. The gearbox input shaft can have either 18 or 24 teeth on its gear depending on what tractor it has come from. The epicyclic unit at the rear of the box is the same as far as I can see. If you can sort out any issues on the front side of the gearbox you should be well on your way.
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.