Adding Oil To A MT Transmission
A lack of oil can cause these transmissions to get very tight if it has really leaked for a long time and has lost almost all of its oil.
The main reason most MTTs size up is the top agitator shaft bearing gets tight from a little water getting in it coupled with the fact that oil does not get into the top agitator shaft bearing very well.
If you want to try to get this washer agitating again without a complete tear-down and rebuilding you can try one or both of these suggestions.
1, turn the washer completely up-side-down for at least a few days and the reaming oil may run into the top agitator shaft bearing, warming up the transmission can help this effort.
2, drill a 1/4" hole in the side of the trans [ if you look at a picture of one of these trans opened up you can see the best place to drill the hole ] and pump 12 ounces of oil in the trans with a little oil pump can, you will have to reseal this hole by tapping and installing a pipe plug. If you do this I would use a much better oil than the MT stuff, go to an auto parts store and get some really good gear oil. When doing this again leave the washer USD for at least a few days and turn the main pulley in the agitation direction by hand to help get the oil worked into the top bearing.
John L.