Tractor is a green 1986 version of a 9130 Steiger with the powershift transmission.  Looks like transmission output shaft is throwing some oil around on the brake rotor and caliper.  Maybe 8k hours on tractor.  Mostly pulls a planter and a grain cart some for the bean combine.

A year ago the park brake/rotor/output shaft got extremely hot when someone inexperienced drove it around half a day on a grain cart with the parking brake on.  Like melted grease in the U joint oil smoke point hot.  Which could have damaged seals, bearings, all sorts of stuff.

Is this a fix it from the back and underneath of the transmission job, or a pull the transmission off the bottom sort of job?  As in, is there a bearing I can access from outside to replace or take the whole trans apart?  Parts diagram not clear.