I work at john deere hy-gard is basically hydraulic oil with detergent. I say the detergent in the oil cleaned out the locker and it working correctly now. I would drain the oil out and go back to 80-90w
The square body axle perch are narrower then gmt 400 you have to cut the perch off and weld new perches at the right length and shocks will not bolt up.