36 Master - stock transmission with n 60000 miles

This subject has had lots of different discussions. Its also a little confusing in some forums. I'd like to hear what people are putting in their drivers that can be purchased at your typical auto or farm store.

Thanks

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My repair manual says 140....maybe I misread the 600 somwhere. Advice is welcome-thanks

140 works perfectly well. Available at various places. I have even used 85W-140 as it is still the viscosity of 140 when hot.