Re: SM VS 400

Posted by D Slater on June 17, 2007 at 18:44:43 from (72.65.144.253):

In Reply to: Re: SM VS 400 posted by Steve2007 on June 17, 2007 at 17:43:26:

Optional low low first gear in a SM would be close to the same speed as a 400 in first low T/A. You would realy notice a difference if the SM had those gears. The information I posted on speeds is from old notes I have from figuring the actual gear ratio of each tractor. Rolling ratious of tire and engine RPM will efect results. The input shaft driving constant mesh gear,ring and pinion and bull gears are the same ratio on a SM and 400. Difference in speed is in transmission gears between SM and 400. 400 first drive gear 21 teeth, driven 52 teeth = 2.4761 to one. SM regular speed first drive gear 19 teeth, driven 44 teeth = 2.31 to one. SM low low first 14 and 49 = 3.5 to one. 400 SMTA and 450 have the same Ratio gears in them so tires or something is changing the speeds CNKS posted for a 400 and SMTA.

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