Application Notes: BW4418; 31 Spline Input, Slip Yoke Style Rear Output Shaft, Cup Style Front Output Yoke, Manual Shift on the Fly, Tag Numbers: 9L34-AA, 9L34-AE, AL34-BA, AL34-BB, BL34-AA, BL34-BA, Hollander Numbers: 412-704, 412-713, Other Numbers: UMT431-2.
Remanufacturing Process
Every transfer case we sell is fully remanufactured to meet or exceed OEM specifications. Our remanufacturing process:
- Deep Clean – To start the remanufacturing process, each transfer case is fully disassembled and cleaned
- Inspection – Each transfer case is carefully inspected for cracks, excessive wear, shaft warp, and chain stretch
- New Components – All seals, bearings, joints and rings are replaced as well as electrical components (solenoids and control units)
- Validation – After reassembly, each individual transfer case is spin tested as part of a detailed checklist validation process
Every unit is fully remanufactured and covered against defects in materials and workmanship. Email us to confirm the current warranty term for this unit before purchase.

