LOL, I knew that was coming.!
So, I will explain myself....
I do believe in changing the engine oil every 50 hours. that's good practice.
on 3 machines now, I've had all 3 puke their first transmissions at about 1250-1350 hours. All of them had their oils changed yearly prior to this. which was around 500-700 hours per year.
Ok. Now, one machine I just rebuilt the transmission in for the 3rd time in about 700 hours. And this has all happened in the span of 1 year or so. Another machine that also had it's first trans repair at 1250 hours also puked out the transmission bearings again 200 hours later.
You can guess that every time a transmission was rebuilt, the oil was changed at that time. so, some of those intervals were only 200 hours apart, and sometimes only about 4 months between failures..
When the transmissions would fail, sometimes it was an old original bearing, sometimes it would be a new bearing that was replaced at the last rebuild. It didn't seem to matter much what I did to them, it didn't seem to help.
So, where I'm at now is this- I replaced all the bearings in the transmission on this last build myself with Non Chinese (non polaris) bearings. This I'm expecting to help a ton. I don't think there's a thing I could have done to help the polaris bearings live. you could have run the slipperiest stuff known to man and changed it every 5 hours and those transmissions would have still failed.... After mechanicing for a living for a number of years, you really get a feel when you look at failures for what is due to lack of maintenance, and what is due to cheap parts...
Change you oil every year, save your money and buy $150 worth of new non polaris bearings when your machine hits about 1000 hours, and have the transmission done. Best insurance you can buy.
As for the engine, found a tear in the throttle body boot between the air cleaner an the throttle body. Nothing I could do about that one. ! Just fix it and hope for the best.
All the rangers are out of the shop now and back on the road. 1 engine and two transmissions in one week is enough breakdowns for awhile. lol.