4F50N, AX4N

Remanufactured Valve Body
Part No. F089


Tech & Install Tips Find a Distributor

Torque valve body bolts in sequence to 80-106 in-lbs

4F50N, AX4N ’98–’03 Torque Specs
  • 4F50N, AX4N Remanufactured Valve Body F089

AX4N Valve Body Identification

Part Number Chart

Part Number Description
AX4N, '94-'98
F089 AX4N/4F50N, '98-'03
F087 4F50N, '04-Later


To identify the correct valve body for your application, look for the first four to five rough forging numbers on the pump body. The numbers will be RF F4, RF F8, or RF XF1. See the black arrows for location of the casting numbers.

The late-model 4F50N will have a square hole in the pump cover. See the red arrow for location.

AX4N, '94-'98 AX4N/4F50N, '98-'03
Rough Forging Number: RF F4 Rough Forging Number: RF F8 or RF XF1
4F50N, '04-Later
Casting Number: RF1P