Re: 400 Farmall Gear Ratios

Posted by Wardner again on January 04, 2005 at 10:31:58 from (64.136.49.228):

In Reply to: Re: 400 Farmall Gear Ratios posted by DWV on January 04, 2005 at 07:41:38:

You are probably right on the slideable first gear on 560. I don't have my 560 book available to check. The M had a low-low first gear option that used a separate countershaft with gear cut into it.

At any rate, I beleive two ratios (1st and 3rd or 4th) are available for the 560 that weren't available at time of mfg for the SMTA-450.

One can also use a 560 ring and pinion in the earlier tractors to lower speed in all gears. I have a SMTA with the 19 tooth first gear and 560 ring and pinion. Top speed is about 11-12 MPH and first gear is exceptionally slow; slower yet using the TA. I swapped all this stuff in order to retain the proper casting date and PN on my SMTA rear frame. I installled the bigger bearings as well although the old ones would have worked.

I responded to this post because I believe the original poster is looking to make some alterations in his trans/axel. I have listed several options that he might want to consider.

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