Overview
The ZF 4646.130.013 ENGINE CONNECTION is a precision-machined OEM sub-assembly designed to interface the engine output directly with the torque converter housing on ZF WG 250, WG 260, WG 310, and WG 311 series transmissions. This critical adapter plate ensures correct axial alignment between the flywheel and the transmission input shaft, absorbing torsional vibration while maintaining a sealed oil-tight boundary. As a genuine ZF component, SKU 4646.130.013 replaces worn or damaged factory units to restore driveline integrity and prevent premature bearing failure. It mounts directly against the TRANSMISSION HOUSING and is secured using the HEXAGON SCREW fasteners, forming the primary structural link between engine and gearbox.
Symptoms of Failure
- Torque converter oil leakage at the bellhousing seam: A degraded engine connection gasket or cracked flange allows ATF to weep past the seal, leaving visible drips under the transmission bellhousing.
- Audible knocking or clunking during gear engagement: Worn locating dowels or a distorted connection plate cause misalignment, producing a metallic impact sound when shifting from Neutral to Drive or Reverse.
- Vibration through the chassis at highway speeds: Loss of concentricity between the engine crankshaft and transmission input shaft creates a low-frequency shudder that intensifies under load.
- Difficulty seating the transmission during reinstallation: A warped or corroded engine connection prevents the transmission from fully mating to the engine block, leaving a visible gap at the mounting flange.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.130.013 |
| OEM Reference | ZF 4646.130.013 |
| Material | Aluminum alloy (EN AC-42100) with corrosion-resistant coating |
| Overall Diameter | 310 mm (12.2 in) |
| Flange Thickness | 18 mm (0.71 in) |
| Bolt Hole Pattern | 8 x M10 on 260 mm PCD |
| Weight | 2.85 kg (6.28 lb) |
| Sealing Surface | Precision-ground flatness ≤ 0.05 mm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This engine connection sub-assembly is engineered for ZF WG-series powershift transmissions used in off-highway and industrial applications. It is a direct fit for the following ZF models: WG 250, WG 260, WG 310, and WG 311 series. It also retrofits to earlier WG 180 and WG 200 variants when used with the correct HOUSING adapter. Always verify the bolt pattern matches your specific transmission bellhousing before installation. The part works in conjunction with the COVER to seal the torque converter cavity and maintain hydraulic pressure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101029 | TRANSMISSION HOUSING | Main structural casing that supports gear clusters and shafts |
| 4646301090 | HOUSING | Intermediate adapter housing for torque converter mounting |
| 4646301087 | COVER | Sealing cover for the torque converter access port |
| 0636015304 | HEXAGON SCREW | M10 x 30 mm fastener for engine connection to housing |
| 0636101828 | CAP SCREW | M12 x 40 mm cap screw for bellhousing attachment |
| 4646301102 | COVER SHEET | Thin metal shim for adjusting axial clearance |
| 4646301235 | COVER SHEET | Secondary shim for fine-tuning converter endplay |
| 0730365067 | TYPE PLATE | Identification plate riveted to the housing |
| 0631311009 | GROOVED STUD | Alignment stud for locating the engine connection |
| 0636101193 | CAP SCREW | M8 x 25 mm cap screw for cover retention |
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