I stuck a screw driver down the fill hole on one of my birfield and found the pink lube with a little gray. This newly aquired vehicle has 165k and is a 94 LC. I don't have the service history of this vehicle so I wonder if you think it has been repacked recently, within the last 60,000 miles, within the last 100,000 or never done at all. I haven't repacked a full time all-wheel drive vehicle before and wonder what have you found in your truck's birfield and at what number of miles. If it was repacked during it's life, do you think the birf was done at a dealer? I don't know what color of grease they use and it seems the vehicle was dealer serviced all it's life.I don't have any issues with the birfield such as clicking or differential fluid leaking, just the common caking of a little birf grease around the outside of the knuckle. Thanks for sharing the info.