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kenmore washer wont spin 80 series model#110.23812100?

my kenmore 80 series washer wont spin it goes throw the whole cycle but when I check it the clothes are wet and the spin cycle did'nt work I can make it spin by trun the basket and then trun the washer back on and some times that works but its taking me a long time to wash one load I have unpluged ever thing and put the washer on its front and look under and there is oil all over the motor and pump.The pump was just changed 3 months ago. Do you have any idea what this might be? And if I can do this myself?