When installing the oil seal, you won't damage the oil seal. With this tool kit will make repair be more convenient and easier. Use this tool AND AM-9990166-88880013 for 7" Crank Seal 22191895 Use 9998238 or AM-9998238 for 7" Crank Seal 20441481 Use 9998238, AM-9998238 or AM-9990166-88880013 for 7" Crank Seal 1543896 Use AM-9990166-88880013 for 7" Crank Seal 85108352 Use 88800561 or AM-88800561 for 6" Crank Seal 20441697 OEM no ref.: 88800619