IH and some aftermarket had some faster 4th gears, but hard to find now. Some of the 6 series had a 4th with gears one tooth bigger driving a one tooth smaller 4th and 5th slider compared to the M. Problem is the transmission has 3 gear sets that are one piece with a different size gear on each end. So sometimes when changing one top and bottom set of gears it gets more involved. Since all SM gears except first is a different ratio and the counter shaft is a different diameter where the gears go. When installing in a M you need all the SM gears, counter shaft and the reverse idler gear. Aftermarket 9 speed may be a option, but they also speed up the pto. So if needing the pto and running the tractor at a higher speed you need to be pulling a light enough load to run at less engine RPM. Also some gear boxes are around that go where the belt pulley gear box is to give another speed between 4th and 5th. Not very common. If you never need a slow first a W6 ring and pinion gear can be used to speed all gears up.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Talk of the Town: What's in Your Tractor's Toolbox? - by Staff. This recent discussion on the Tractor Talk discussion board here at the on-line magazine drew so much response and proved to be so interesting that we wanted to share it with you here. The names of the people participating in the discussion have been left out to "protect the innocent" (to quote a once-popular television series).
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
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.
