Originally Posted by
Duane
I changed my rear main without pulling the engine rather easy, it took a half a Saturday, 2000 miles later, it always has a drop hanging from the bellhousing drain plug. If you read the m715 quirks manual it tells you to leave the bellhousing drain plug out unless fording, if not, the oil that seeps from the rear main will eventually fill up and get on the clutch. A better indicator to see how much it is really leaking is by checking the dipstick. I don't have to add any oil to my truck between oil changes, and I change my oil every year, about 1000 miles. If you are trying to achieve a no leak stock m715, good luck, its been tried by many, and am not sure if achieved by any, at least not long term.
Duane