You guys have the current experience with various brands of fluid. However, I have to say I am a skeptic. I can see some equipment being designed for "low viscosity" or "high viscosity" hydraulic fluid having nothing to do with brands or "quality." I just doubt there is proven good versus bad among commercial hydraulic fluids that would cause one to produce squeal and the other no squeal. I predict that whatever it was that caused your squeal will be back regardless of what brand fluid you use.
You guys have the current experience with various brands of fluid. However, I have to say I am a skeptic. I can see some equipment being designed for "low viscosity" or "high viscosity" hydraulic fluid having nothing to do with brands or "quality." I just doubt there is proven good versus bad among commercial hydraulic fluids that would cause one to produce squeal and the other no squeal. I predict that whatever it was that caused your squeal will be back regardless of what brand fluid you use.
I unloaded 3-1000 lb+ bales last night and not a peep out of the hydraulics. The last time I unloaded some prior to the fluid change it was squealing horribly. No doubt in my mind that it was the TSC hydraulic fluid causing the problem.