Haven't been here in quite some time. My neighbor asked me to grade his driveway, it's about a 25 degree, and about a 100 yards from the road up to the house. When I used the rear blade, I noticed the front heels were not driving. The tractor is 7 years old, this is the first time I've engaged the 4 wheel drive, and the front wheels didn't work. Have to leave soon to go to the nursing home to feed my wife, so I haven't looked at it. Any ideas? Oh, I did have to add a quart of transmission fluid to her to bring the level up to full.