Gday all, Ive had a problem with my 4 speed auto for a while now so I ended up getting it strenghtened.Usual mods done to box, heavy duty clutch packs,bands and line pressure etc.The main problem, apart from the usual slipping clutches was that it was seeming to be getting stuck in between gears,mainly 4th but sometimes 3rd and would start shuddering. To fix the problem, I would either have to back off the throttle and the box would eventually fall back into place or put my foot down and 'sometimes' it would drop back into the lower gear.This would happen without driving the car hard also.I thought after having the box rebuilt that it would go away but it hasnt.The gearbox builder seems to think that it must be something electronic somewhere.Has anyone had this problem happen to them? The car is putting out 330rwkws street and 352rwkws on race. Any help would be much appreciated.Thanx