Well, there are tons of guys that swear by the Rotella, and there's been research done by people whom have contacted Hydro-Gear (maker of the hydro unit) and Shell (makers of Cub fluid) and found that Rotella 15w-40 is quite close to a perfect suitable alternative. It has been run for years and many hours and has a great testimonial evidence track for it. I know it doesn't work for the old IH rears that use HyTran, but those are the Sauer-Sunstrand pumps.
There is still the chance that it would be the problem though. I swapped filters and it didn't change anything. I ordered a charge pump seal, gonna be putting it in this weekend hopefully. If it still doesn't change anything, looks like I'll be saving up for the 105.00 worth of the OEM fluid!
And yah, it's been DRENCHED here all week. Actually have mud ruts in the making from test driving the Cub up and down the hills! The daughter loves it, she acts like she's on a rollercoaster when I floor it and take it for a spin.
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