Ok, looking for best handling on my fiesta to boss conv. Fiesta chassis with 4370 brushless 380 size drive and boss body. So far, chassis has toys braces, hr sway bars. switched tan rear springs to front and green to back. Put traxxas 50k fluid in shimmed rear dif. I have tamiya 32mm tires/wheels and hpi 32/35 tires wheels, all grip. It still spins out too easily. You cannot hook, or drift, because to unpredictable. I have sticky tires! I run it on my shop floor which is smooth concrete. In NW WA the asphalt drive is never dry enough this time of year.. I have heavier, 60/80k shock oil and black springs on order... What does it take to get this car to hook? Diff oil recommends?