If returning a transfer case core, please see the link below for ATK’s core return procedure.

CLICK HERE: ATK Core Return Process

ATK TCS399 Features:

Each transfer case is tested on a simulator that recreates actual driving conditions & analyzes performance, to ensure seamless engagement & leak free performance before it leave the assembly line.

• Note: w/ 2 Wire Pstn Switch Above Shft Lvr, No Speedo Hole
• Drive Type: 4WD
• Factory Code(s): NP231D
• Front Input Type: 23 Spline Input, 0.84" Expsd Inpt Shft
• Mounting Bracket Included: No
• OEM Make: New Process
• Rear Output Type: Slip Yoke Rear Output
• Shift Operation Type: Manual
• Shift Type: Manual
• Transfer Case Fluid Capacity: 2.5
• Transfer Case Fluid Type: ATF +4
• Transfer Case Manufacturer Code: NP231D
• Transfer Case Motor Included: No

  Please CLICK HERE for ATK Warranty