This listing is for a brand new complete rear differential for the Honda TRX420 Rancher 2x4 or 4x4. It is not a rebuilt part. It is not an aftermarket part. It is a brand new Genuine Honda product ready to bolt right on. Simply add rear differential fluid and it is ready to go. This rear differential will fit the following: 2014 - 2016 TRX420FA1 2014 - 2016 TRX420FA2 2014 - 2016 TRX420FE1 2014 - 2016 TRX420FM1 2014 - 2016 TRX420FM2 2014 - 2016 TRX420TE1 2014 - 2016 TRX420TM1 NO CORE REPLACEMENT OR CORE CHARGE !!!