Hey guys...I've posted this before with no solution.
'99 Ranger, 4.0, 5R55E trans. Rebuilt 13,000 miles ago. Shifts great.
In the past 2 months: When going downhill, usually 65-70MPH, transmission occasionally comes out of OD...RPM's raise 3-400 RPM's for 1-2 seconds, then locks back up in...