Pull the cabinet, remove the drum pulley, then the drum blower wheel. Then remove the drum and look in front of the drum shaft sleeve bearing. you will find 2 o-rings one at the front and another at the rear of the bearings. they usually get brittle from the heat and will squeel. throw them away. clean and lube the shaft with a high quality turbine oil and also the bearings.
reinstall in the reverse, and you will solve your problem.