pretty impressive improvement from the oil, wondering if you ever updated the differentials to synthetics, made the biggest or at least equal to the engine oil change in seat of the pants test so far for me last time I used it, unfortunately switched when i changed out a seal on my 300 k Ranger about four years ago, now running the valvoline semi stuff, redline worked great for me, the axle bearing surface was like polished chrome. will be going back to it this week or next time i get a dry day to change it. and will post test when done, I have an old American Flyer train set and it would barely chug around the tree, I took a match heads worth of the redline red chassis grease and put it on the tiny worm gear motor drive and the train now goes so fast it fly's off the track on curves, so I'm hooked on their stuff, even when new it never went like that,
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