Washing machine constantly goes out of balance

Ok, this is a tricky one so here are a few things to check, first open door and spin drum any direction. watch drum and also listen while it spins. do this a few times to ensure you have listened or see any possible issues like: unusual grinding noise,tub out of round," wobbling", rubbing anywhere on front rubber door boot or plastic slivering around area of plastic pieces. if that is ok then with two fingers and gentle lift upper part of basket slightly to check for ant slop or slack in rear bearing. if thats ok then next check to make sure that all four feet are firm not to allow washer to, "teeter totter" form two feet to other two feet. lean on top from side to side and make sure unit is stout or firm footed on ground. last is to make sure your floor is not weak. dose your dryer shake bad when washer goes into spin. this is a cause of out of balance. make sure your loads are same materials. imagen when there wet if they would weigh the same or balance out when there around inside basket spinig. thank you for reading this and hope it helps.