Ford HD Industrial SOS

My Select O Speed finally gave up on me today, won’t move in any gear including reverse, i think it’s finally time for the four speed I’ve been talking about for the last couple years. I just used the tractor the other day to move a junk car. Went to do a little fire wood today and left me stranded on the front lawn. Love the tractor but the transmission has been on the brink of failure since I have had it. Hope everyone is doing well, from Southern Albany County NY trees are changing and absolutely gorgeous. Thanks for reading and listening.
 

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1st - check to see that the TDC didn't pop out!

If it's still engaged,split the dang thing and put a TLC and/or input shaft repair in it.

Finally, that SOS is ten times the transmission that old 4 speed is. Personally, I'd never even consider swapping out an SOS for a gear transmission.
 
(quoted from post at 04:13:55 09/29/20) Have an 881 trans for cheap if you want to try to fix it.Located NJ 07838

IIRC, 881 input shaft differs from 871. I would not think an industrial model would have been equipped with the 881 version of the SOS.
 

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