View 1 Photo View 0 Videos Fuller 18 Speed Mainshaft Assembly 17 Teeth, Part # 4303403 Newly Listed $180.40 USD MAINSHAFT ASSEMBLY 17 TEETH FULLER 18 SPEED 18918/16918/16718, 1 - 4303403 MAINSHAFT, 1 - 62504 ROLL PIN, Quantity2ConditionNewFits To Make(s)FULLERFits To Model(s)RTLO18718BStock NumberCCT S3108B FBU MLS Number14338157CategoryTransmission Parts Last Updated4/29/2026 LocationWatseka, IL, US Sold ByLKQ Heavy Truck (855) 905-___ SHOWNUMBERCall Seller Email Seller Save More Info