Posted by Larry NCKS on October 14, 2012 at 04:35:59 from (70.195.0.73):
In Reply to: 800 SOS posted by TX641D on October 12, 2012 at 21:59:33:
Mike, as I understand it, early 4 and 5 speeds had output shafts with course splines, whereas all SOS were fine splined. At mid *01 production all transmissions had the fine splined output. It is not a difference of size of the shaft, but the number of splines, 10 vs. 23. The serial break shows to be 106115 and start date 1/1/60.
If you have a 23 spline end on your 5 speed output shaft you've got a direct exchange. If you have 10, you'll have to manufacture a coupler.
There is no difference in rear end ratios. 5 speeds run more slowly on the road because 5th gear ratio is roughly akin to 9th gear on the SOS. 4 speed road speed is somewhere around halfway between 5 speed and SOS.
This post was edited by Larry NCKS at 01:34:42 10/15/12.
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