E-LST2 need some help

[YogyBrushless]

hey guys i just ran my LST2 with cc2200 motor and MMM on 5S power is amazing, i ran for 5 mins just messing around ambient temp was 104f (at night) hehe, anyways the thing is everything was cool but the transmission shaft and TDR single speed adapter was hot i dont know how hot it was but in the house i measured it at 90f. its an FOC with gear swap. i am using all TDR products . what do u think guys could be the problem or is it not a problem ?? and what should i check for

any info would be great
Yousef