View 1 Photo View 0 Videos New Cummins ISM Rear Main Seal, Part # 4089542 4023018 4923644 $66.76 USD NEW REAR MAIN SEAL FOR CUMMINS ISM Rear Crankshaft Seal Dry Clutch NON-REPTO w/ Wear Ring 6.56in Free I.D. x 7.704in O.D. x 0.687in Width 166.50mm Free I.D. x 195.68mm O.D. x 17.44mm Width,... ConditionNewPart Number4089542 4023018 4923644Stock Number136097 MLS Number11977315CategoryEngine Miscellaneous Parts Last Updated7/10/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info