Someone stop me if I am wrong, but I think there is only 3 bronze bushings in the entire rear end. 2 on the reverse idler gear and one in the end of the lower trans shaft for the PTO. There are two bushings for the brake band pivots, but they are sealed off from the rear end. I would have to say the High GL rating is most likely shear additives for high load applications and I think they use sulpher for that. If you let water get in the rear end from sitting outside or washing the tractor a lot, it could cause sulphuric acid to form and eat the bronze. My H manual does say to change the gear oil once a year. When they were new, some gear oils acually had lead in them for high friction protection. Lead is one of the best friction additives there is, but the gov had their way with that way before the EPA existed. I do know where about 20, 1 gallon square metal cans of that old stuff with the lead is sitting, but you have to buy the ring and pinion/differential assemblys to get them and they fit early-mid 50s buicks.
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Today's Featured Article - The Great Escape - by Dave Hollrah. It all began Monday with a little baling of second crop on the lake shore field, and as I drove out past my sister and her hubby's place, this small calling sound could be heard from the general direction of their manure pile. Out of the yard, over the cows and bale piles, through the dozer piles, poplars, and brush, out onto the ditch grade road, past the noisy 6.2 diesel engine pulling my well traveled Suburban along. Well it sure didn't take me long to figure out what it was because I alrea
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