What is the difference between the two oil pump drive gears that are listed for the early 6-404?
If your customer has a separate shaft and gear, he can purchase the NR-32428 gear only. However, if the shaft is worn, or if the customer has the one piece shaft and gear assembly, it should be replaced with NR-45134. New shafts used with NR-32428 gears are not available from Deere & Company® or Reliance.