hi all i am looking for advice on lube for new bearings. some history first .the milling machine is Italian made NOVAR. when i purchased it the machine did have noisy bearings so i changed the sludge (oil) and used auto trans fluid (ep oil- extreme pressure) and it has been good for a few years but still noisy , so i decided at last to fit new bearings. The bearings are in the gearbox and not the spindle. the bearings consist of double row ball type,, single row ball type and tapered roller. Now my main question is do i stick with the tranny oil or use 90w gear oil?? the oil pump in the gearbox is a paddle which spins and throws oil around but there is no pump of any sort. i like the idea of the lighter oil because it gets up higher quicker. hope someone may have an idea for me thank you in advance.( hope the photo helps)