Description
PAI BOS-7697 is a differential pinion / input seal that replaces Mack 88AX458 on Mack CRDPC 92, CRDPC 112, CRDPC 200, CRDPC 202, CRD 201, and CRD 203 series rear-drive carriers and the Volvo-shared variants used on post-merger Mack and Volvo vocational and on-highway tractors. The seal measures 3.500″ free ID x 4.506″ OD x 0.500″ width (88.9 mm x 114.45 mm x 12.7 mm).
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | BOS-7697 |
| Part Type | Differential Seal |
| Free Inside Diameter | 3.500″ (88.9 mm) |
| Outside Diameter | 4.506″ (114.45 mm) |
| Width | 0.500″ (12.7 mm) |
| Carrier Compatibility | Mack CRDPC 92/112, CRDPC 200/202, CRD 201/203 |
Cross References
This differential seal replaces or is equivalent to the following part numbers:
- Mack: 88AX458, 23421718, 25623960
- Volvo: 23421718, 25623960
- National: 4491V
Applications
This differential seal fits the following Mack rear-axle carriers and the chassis they appear in:
- Mack CRDPC 92 / CRDPC 112 single-reduction carriers
- Mack CRDPC 200 / CRDPC 202 single-reduction carriers
- Mack CRD 201 / CRD 203 carriers
Representative Mack chassis using these carriers:
- Mack CXN, CXU, CHU, Pinnacle
- Mack Granite, Vision
- Mack RD / DM vocational chassis (carrier-equipped variants)
Verify your carrier model number (cast on the carrier housing) and seal location (input vs. output) before ordering — Mack uses several seals of similar appearance with different inside-diameter and width dimensions across the CRD family.
