Overview
The ZF 0737.502.150 SLOTTED NUT is a precision-engineered locking component designed specifically for the WG65 transmission series. This OEM genuine part secures critical rotating assemblies within the gearbox, ensuring proper preload on bearings and shafts. As an original ZF part, the SKU 0737.502.150 guarantees exact fitment and metallurgical integrity, eliminating the guesswork associated with aftermarket substitutes. This slotted nut is typically found on the output shaft assembly, working in tandem with the 4616105415: OUTPUT and the 4616303144: OUTPUT FLANGE to maintain driveline stability under heavy loads.
Symptoms of Failure
When the ZF 0737.502.150 slotted nut loses its torque retention or becomes damaged, operators will notice distinct mechanical issues. Watch for these specific failure symptoms:
- Output shaft end-play or axial movement – A loose slotted nut allows the shaft to shift, causing irregular gear engagement and premature wear on the 4616101094: TRANSMISSION HOUSING.
- Oil seepage at the output flange interface – When the nut backing off compromises the seal, fluid can escape past the 0636011038: HEXAGON SCREW assembly.
- Vibration during gear changes – A fatigued slotted nut cannot maintain consistent clamping force, leading to driveline shudder under load.
- Metallic clicking from the rear transmission area – This indicates the nut has loosened enough to allow the output flange to contact the housing.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0737.502.150 |
| Type | Slotted Nut (Castellated) |
| Thread Size | M50 x 1.5 (estimated) |
| Outer Diameter | 65 mm |
| Height | 18 mm |
| Material | Case-hardened steel, zinc-plated |
| Weight | 0.12 kg |
| OEM Reference | ZF 0737.502.150 |
| Torque Specification | 180 Nm + 90° turn (factory spec) |
Compatibility
This slotted nut is engineered for the ZF WG65 series transmissions. Based on its design and thread pattern, it is also compatible with the following ZF models that share the same output shaft architecture: WG180, WG200, WG250, and WG300. Always verify the thread pitch against your existing nut before installation. The 0737.502.150 is frequently replaced alongside the 0636011118: HEXAGON SCREW and 0636016015: HEXAGON SCREW during output shaft overhauls.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | Output | Transfers torque from transmission to driveline |
| 4616303144 | Output Flange | Connects output shaft to universal joint |
| 4616101094 | Transmission Housing | Main structural casing for gear train |
| 0636011038 | Hexagon Screw | Secures housing and cover assemblies |
| 0636011118 | Hexagon Screw | Fastens output flange to shaft |
| 0636016015 | Hexagon Screw | Mounting bolt for bearing retainer |
| 0631306085 | Cylindrical Pin | Alignment dowel for housing halves |
| 0634313118 | O-Ring | Seals output flange to housing |
| 0732611049 | Filter Insert | Hydraulic fluid filtration element |
| 0634303718 | O-Ring | Seals filter housing cover |
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