Did it today-pretty good chore--by myself as always-crawled under it and out 100 times..gotta get the gear oil to pour back in it tomorrow. Walmart had none at two stores=book says 80w90 so that's what I plan to put back in it-one place had UTF but it did not say 80w90 and sloshed in bucket sounded thin..Good bit of tiny shavings on the magnet plug. Is this normal? Less than 300 hrs on the tractor so prob never been changed in 20 yrs..Lots of water in it--looked just like chocolate malt in color..Thanks