3rd member talk (ring&pinion setup etc.)

[gon]

Hi there.
I have all those tools ( the hardest to find is a Small torquewrench, Inch-Lbs model with beam or dial indicator to measure rotational torque (to check pinion bearing preload) I have managed to get a second hand Tohnichi Rotary Torque Screwdriver Model 26RTD (http://www.tohnichi.com/products/pro_RTD.asp)).
I have installed my dif 4 or 5 times, last time it was with a brand new 4.7 ring and pinion.
I did everything according to the manual, and the dif made no noise at all.
After an our on track with slicks and grip driving style the differential still makes no noise, but in the last half hour I practiced a little drifting, and the dif started to whine like crazy.
I am suspecting that the problem is the oil temperature (I’m installing and oil sensor and an oil temp gauge in the differential) or another possible problem is when you are drifting for a long period, the oil goes to the side axle (due to G forces) and stops lubing the ring and pinion.

I don't think that the problem is the crush sleeve (I have suspected that, but after my new 4.77 started winning I did take it out again, and it doesn't seem that the pinion is lose or something.) I did notice that after drifting the differential is incredibly hot (I Have a KAZZ 2way)