hi guy,s just reading some of the 1/4 mile story,s wicked stuff well i have a small problem when and only when im driving the car hard track, the ring etc im getting a whining what sound,s like it,s coming from the g,box taken plug no filling,s ets etc fresh oil and used an additive as suggested made no difference, the box change,s ok under normal driving, it,s got 90k on the car now diff ?? or g,box beraing is it cheaper to put a s,hand box in ??? help and thought,s would be appriecated thanks in advance cwt...