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Here is a pic of two sector shafts. The top one is from an F4 thru F6 box and the bottom one is from an F1 to F3 box. By looking at your pic I would swear it is from an F1 but the dimensions don't match. Both take the same nut for the pitman arm at 7/8-14 thread.
F1 dimensions:
1 1/8 machined shaft diameter
3 13/16 length of machined area for seal and bushing
roller width 1 1/8
roller diameter 1 5/8
total length is 8 1/4
4 groups of 8 splines
pitman arm hole 1 inch
F4 dimensions:
1 1/4 machined shaft diameter
3 13/16 length of machined area for seal and bushing
roller width 11/16
roller diameter 2 inch
total length is 8 9/16
4 groups of eight splines
pitman arm hole 1 1/8 inch
Both 7RT & 7EW use the same sector shaft seal: B6A-3591-A = 1 15/64" I.D. x 1 11/16" O.D. x 3/16" thick.
The former Gemmer steering factory is north of the Edsel Ford Freeway and the former Packard factory in Detroit, both are vandalized and burned out ruins.
11-01-2016, 01:01 PM
