530 630 trans noise

Hope this helps,

There is really nothing wrong with anything you've said. However, I've worked on a number of 730,830 engines that did NOT have internal balancers. Vibrations are more pronounced on these engines when speeds approach 2000 RPM. There is an inherent out-of-balance in all inline 4 cylinder engines. The amount of mass at the center line of the crankshaft between the bottom of stroke and top of the stroke is not equal. That creates vibrations. At certain "critical speeds" vibratons occur and that causes other parts near them to vibrate also (chatter in a triple range). Those vibrations can be reduced by dampers, lowering the mass of the reciprocating parts, or internal balancers which turn twice the speed of the crankshaft. The six cylinder engines are not plagued as badly with vibrations because not all of the piston/rods are at the bottom or top of a stroke at the same time. An oil slinger in the transmission is really not needed if the clutch is disengaged, or the tractor is basically only used while in some forward or reverse gear. When the input shaft turns the lower output shaft (in gear), oil is naturally slung up from the lower output shaft to lubricate the upper input shaft bearings. Without a slinger, you would need to make sure that one of the input shaft gears was touching transmission oil. As you said, you increased the oil level until it did. Nice talking to you.