So i pulled a dumb move...in a big hurry to beat a storm i grabbed the wrong white one gallon jug and put about a pint of Round Up in the hydraulic fluid of my 855 tractor. It ran for about 5 minutes then stopped. I drained the fluid, cleaned the screen and changed the filter. Filled $75 worth of fresh low vis Hyguard...moved three feet and stopped. Drain and repeat five more time but with the same "fresh" oil hoping to flush out the contaminants before i drop another $75. each time i did this, it would move a bit farther and the screen was less clogged, but now I have very small metal shavings.
What do you think? Pump or transaxel? Please say pump.